Stephen Kolek

Kansas City Royals (ST)

Age: 28

Bats/Throws: R/R

6'3" / 210

DOB: 4/18/1997

(28 years, 11 months, 24 days)

Player Dashboard:

Stats

Partial SeasonsPreseason ProjectionsIn-Season ProjectionsMinor LeaguesSpring TrainingMLB Regular Season

Season	Team	Level	Age	W W - Wins	L L - Losses	SV SV - Saves	G G - Games Pitched	GS GS - Games Started	IP IP - Innings Pitched	K/9 K/9 - Strikeouts per 9 Innings ((SO*9)/IP)	BB/9 BB/9 - Walks per 9 Innings ((BB*9)/IP)	HR/9 HR/9 - Home Runs per 9 Innings ((HR*9)/IP)	BABIP BABIP - Batting Average on Balls in Play	LOB% LOB% - Left on Base Percentage	GB% GB% - Ground Ball Percentage (GB/BIP)	HR/FB HR/FB - Home Run to Fly Ball Ratio	vFA vFA - Fourseam Fastball velocity (Pitch Info)	ERA ERA - Earned Run Average ((ER*9)/IP)	xERA xERA - Expected ERA	FIP FIP - Fielder Independent Pitching on an ERA scale	xFIP xFIP - Expected Fielder Independent Pitching where Home Runs are calculated as 10.5% of Fly Balls induced	WAR WAR - Wins Above Replacement
2018	LAD	R	21	0	0	1	3	0	4.1	6.23	2.08	2.08	.313	71.4%	68.8%	100.0%		6.23		6.64	3.94
2018	LAD	A	21	2	0	2	14	0	27.1	8.89	1.98	0.00	.232	90.9%	66.2%	0.0%		0.66		2.16	2.58
2018	LAD	MiLB	21	2	0	3	17	0	31.2	8.53	1.99	0.28	.247	87.0%	66.7%	7.1%		1.42		2.78	2.77
2019	LAD	A	22	7	8	0	27	25	131.1	7.47	3.29	0.48	.332	58.8%	46.9%	4.9%		5.00		3.71	3.92
2021	SEA	A	24	1	0	0	2	0	3.0	0.00	6.00	0.00	.300	60.0%	40.0%	0.0%		6.00		6.23	7.66
2021	SEA	A+	24	3	3	0	21	9	54.2	10.87	3.29	1.15	.329	60.4%	38.7%	14.6%		5.93		4.66	4.37
2021	SEA	AA	24	0	0	0	1	0	2.0	4.50	13.50	0.00	.375	57.1%	12.5%	0.0%		9.00		8.48	11.14
2021	SEA	MiLB	24	4	3	0	24	9	59.2	10.11	3.77	1.06	.329	60.1%	37.5%	13.0%		6.03		4.86	4.76
2022	SEA	AA	25	6	13	0	27	27	143.2	8.65	4.13	0.63	.322	69.0%	47.0%	7.7%		4.51		4.50	5.16
2023	SEA	AA	26	2	0	0	5	0	7.2	12.91	2.35	0.00	.077	100.0%	76.9%	0.0%		0.00		2.00	2.60
2023	SEA	AAA	26	4	2	4	44	1	61.2	9.49	4.38	0.44	.296	62.7%	57.5%	8.8%		4.23		4.08	4.53
2023	SEA	MiLB	26	6	2	4	49	1	69.1	9.87	4.15	0.39	.280	64.4%	59.0%	8.1%		3.76		3.85	4.32
2024	SDP	ST	27	0	0	0	7	0	6.2	9.45	5.40	0.00	.294	100.0%	52.9%	0.0%		0.00		3.89	5.17
2024	SDP	MLB	27	3	0	0	42	0	46.2	7.52	2.31	0.77	.359	64.3%	55.9%	12.9%	95.8	5.21	4.58	3.57	3.46	0.3
2025	KCR	AAA	28	1	3	0	5	5	19.0	9.47	4.74	0.95	.452	68.9%	50.0%	12.5%		6.63		4.65	4.72
2025	SDP	AAA	28	1	0	0	6	6	27.0	7.00	1.67	1.33	.366	66.0%	56.8%	23.5%		6.00		5.11	4.35
2025	---	MiLB	28	2	3	0	11	11	46.0	8.02	2.93	1.17	.400	67.4%	54.1%	18.2%		6.26		4.92	4.50
2025	SDP	ST	28	0	1	0	5	3	17.1	6.23	3.12	0.00	.315	78.3%	66.7%	0.0%		2.60		3.39	4.41
2025	2 Tms	MLB	28	5	7	0	19	19	112.2	6.15	2.48	0.72	.264	70.5%	51.4%	8.9%	94.2	3.51	4.30	3.82	4.16	1.7
2025	SDP	MLB	28	4	5	0	14	14	79.2	6.33	2.94	0.90	.293	71.1%	50.6%	10.7%	94.1	4.18	4.48	4.28	4.42	0.8
2025	KCR	MLB	28	1	2	0	5	5	33.0	5.73	1.36	0.27	.194	67.8%	53.5%	3.8%	94.4	1.91	3.83	2.71	3.53	0.9
2026	KCR	ST	29	1	0	0	1	1	2.0	9.00	4.50	0.00	.429	75.0%	42.9%	0.0%		4.50		3.15	5.02
2026	FGDC	PROJ	29	4	4	0	36	8	72.0	6.41	2.83	0.91	.301	69.5%				4.25		4.16		0.5
2026	Steamer	PROJ	29	4	4	0	36	8	75.0	6.57	2.75	0.98	.312	70.7%	51.5%			4.26		4.16	4.12	0.6
2026	ZiPS	PROJ	29	7	7	0	29	24	129.7	6.25	2.91	0.83	.289	68.3%				4.23		4.15		1.5
2026	ZiPS DC	PROJ	29	4	4	0	36	8	70.0	6.25	2.91	0.83	.289	68.3%				4.23		4.15		0.5
2026	ATC	PROJ	29	3	3	0	26	7	60.0	6.50	2.79	0.92	.302	69.1%				4.30		4.13		0.5
2026	THE BAT	PROJ	29	2	3	0	26	7	60.0	6.44	3.04	0.92	.301	68.0%				4.55		4.24		0.6
2026	THE BAT X	PROJ	29	2	3	0	26	7	60.0	6.53	3.08	0.96	.300	68.1%				4.57		4.29		0.5
2026	OOPSY	PROJ	29	4	2	0	36	8	73.0	6.45	2.86	1.00	.311	68.1%				4.58		4.24		0.5
2026	FGDC	ROS	29	4	5	0	32	10	82.0	6.57	2.96	0.94	.312	70.6%				4.28		4.18		0.7
2026	Steamer	ROS	29	4	5	0	32	10	82.0	6.57	2.96	0.94	.312	70.6%				4.28		4.18		0.7
2026	ZiPS DC	ROS	29	4	4	0	32	10	78.0	6.25	2.91	0.83	.289	68.3%				4.23		4.15		0.8
2026	ATC DC	ROS	29	5	4	0	32	10	82.0	6.51	2.80	0.96	.301	69.4%				4.30		4.19		0.7
2026	THE BAT	ROS	29	4	5	0	33	10	70.0	6.25	3.01	0.94	.304	67.9%				4.60		4.29		0.6
2026	THE BAT X	ROS	29	4	5	0	33	10	70.0	6.31	3.05	0.98	.300	68.0%				4.62		4.36		0.6
2026	OOPSY	ROS	29	4	2	0	32	10	79.0	6.45	2.86	1.00	.311	68.1%				4.58		4.24		0.7
Total	- - -	MLB		8	7	0	61	19	159.1	6.55	2.43	0.73	.294	68.3%	52.8%	9.8%	94.5	4.01	4.38	3.75	3.96	2.0

Season	Team	Level	Age	W W - Wins	L L - Losses	SV SV - Saves	G G - Games Pitched	GS GS - Games Started	IP IP - Innings Pitched	K/9 K/9 - Strikeouts per 9 Innings ((SO*9)/IP)	BB/9 BB/9 - Walks per 9 Innings ((BB*9)/IP)	HR/9 HR/9 - Home Runs per 9 Innings ((HR*9)/IP)	BABIP BABIP - Batting Average on Balls in Play	LOB% LOB% - Left on Base Percentage	GB% GB% - Ground Ball Percentage (GB/BIP)	HR/FB HR/FB - Home Run to Fly Ball Ratio	vFA vFA - Fourseam Fastball velocity (Pitch Info)	ERA ERA - Earned Run Average ((ER*9)/IP)	xERA xERA - Expected ERA	FIP FIP - Fielder Independent Pitching on an ERA scale	xFIP xFIP - Expected Fielder Independent Pitching where Home Runs are calculated as 10.5% of Fly Balls induced	WAR WAR - Wins Above Replacement
2018	LAD	R	21	0	0	1	3	0	4.1	6.23	2.08	2.08	.313	71.4%	68.8%	100.0%		6.23		6.64	3.94
2018	LAD	A	21	2	0	2	14	0	27.1	8.89	1.98	0.00	.232	90.9%	66.2%	0.0%		0.66		2.16	2.58
2018	LAD	MiLB	21	2	0	3	17	0	31.2	8.53	1.99	0.28	.247	87.0%	66.7%	7.1%		1.42		2.78	2.77
2019	LAD	A	22	7	8	0	27	25	131.1	7.47	3.29	0.48	.332	58.8%	46.9%	4.9%		5.00		3.71	3.92
2021	SEA	A	24	1	0	0	2	0	3.0	0.00	6.00	0.00	.300	60.0%	40.0%	0.0%		6.00		6.23	7.66
2021	SEA	A+	24	3	3	0	21	9	54.2	10.87	3.29	1.15	.329	60.4%	38.7%	14.6%		5.93		4.66	4.37
2021	SEA	AA	24	0	0	0	1	0	2.0	4.50	13.50	0.00	.375	57.1%	12.5%	0.0%		9.00		8.48	11.14
2021	SEA	MiLB	24	4	3	0	24	9	59.2	10.11	3.77	1.06	.329	60.1%	37.5%	13.0%		6.03		4.86	4.76
2022	SEA	AA	25	6	13	0	27	27	143.2	8.65	4.13	0.63	.322	69.0%	47.0%	7.7%		4.51		4.50	5.16
2023	SEA	AA	26	2	0	0	5	0	7.2	12.91	2.35	0.00	.077	100.0%	76.9%	0.0%		0.00		2.00	2.60
2023	SEA	AAA	26	4	2	4	44	1	61.2	9.49	4.38	0.44	.296	62.7%	57.5%	8.8%		4.23		4.08	4.53
2023	SEA	MiLB	26	6	2	4	49	1	69.1	9.87	4.15	0.39	.280	64.4%	59.0%	8.1%		3.76		3.85	4.32
2024	SDP	ST	27	0	0	0	7	0	6.2	9.45	5.40	0.00	.294	100.0%	52.9%	0.0%		0.00		3.89	5.17
2024	SDP	MLB	27	3	0	0	42	0	46.2	7.52	2.31	0.77	.359	64.3%	55.9%	12.9%	95.8	5.21	4.58	3.57	3.46	0.3
2025	KCR	AAA	28	1	3	0	5	5	19.0	9.47	4.74	0.95	.452	68.9%	50.0%	12.5%		6.63		4.65	4.72
2025	SDP	AAA	28	1	0	0	6	6	27.0	7.00	1.67	1.33	.366	66.0%	56.8%	23.5%		6.00		5.11	4.35
2025	---	MiLB	28	2	3	0	11	11	46.0	8.02	2.93	1.17	.400	67.4%	54.1%	18.2%		6.26		4.92	4.50
2025	SDP	ST	28	0	1	0	5	3	17.1	6.23	3.12	0.00	.315	78.3%	66.7%	0.0%		2.60		3.39	4.41
2025	2 Tms	MLB	28	5	7	0	19	19	112.2	6.15	2.48	0.72	.264	70.5%	51.4%	8.9%	94.2	3.51	4.30	3.82	4.16	1.7
2025	SDP	MLB	28	4	5	0	14	14	79.2	6.33	2.94	0.90	.293	71.1%	50.6%	10.7%	94.1	4.18	4.48	4.28	4.42	0.8
2025	KCR	MLB	28	1	2	0	5	5	33.0	5.73	1.36	0.27	.194	67.8%	53.5%	3.8%	94.4	1.91	3.83	2.71	3.53	0.9
2026	KCR	ST	29	1	0	0	1	1	2.0	9.00	4.50	0.00	.429	75.0%	42.9%	0.0%		4.50		3.15	5.02
2026	FGDC	PROJ	29	4	4	0	36	8	72.0	6.41	2.83	0.91	.301	69.5%				4.25		4.16		0.5
2026	Steamer	PROJ	29	4	4	0	36	8	75.0	6.57	2.75	0.98	.312	70.7%	51.5%			4.26		4.16	4.12	0.6
2026	ZiPS	PROJ	29	7	7	0	29	24	129.7	6.25	2.91	0.83	.289	68.3%				4.23		4.15		1.5
2026	ZiPS DC	PROJ	29	4	4	0	36	8	70.0	6.25	2.91	0.83	.289	68.3%				4.23		4.15		0.5
2026	ATC	PROJ	29	3	3	0	26	7	60.0	6.50	2.79	0.92	.302	69.1%				4.30		4.13		0.5
2026	THE BAT	PROJ	29	2	3	0	26	7	60.0	6.44	3.04	0.92	.301	68.0%				4.55		4.24		0.6
2026	THE BAT X	PROJ	29	2	3	0	26	7	60.0	6.53	3.08	0.96	.300	68.1%				4.57		4.29		0.5
2026	OOPSY	PROJ	29	4	2	0	36	8	73.0	6.45	2.86	1.00	.311	68.1%				4.58		4.24		0.5
2026	FGDC	ROS	29	4	5	0	32	10	82.0	6.57	2.96	0.94	.312	70.6%				4.28		4.18		0.7
2026	Steamer	ROS	29	4	5	0	32	10	82.0	6.57	2.96	0.94	.312	70.6%				4.28		4.18		0.7
2026	ZiPS DC	ROS	29	4	4	0	32	10	78.0	6.25	2.91	0.83	.289	68.3%				4.23		4.15		0.8
2026	ATC DC	ROS	29	5	4	0	32	10	82.0	6.51	2.80	0.96	.301	69.4%				4.30		4.19		0.7
2026	THE BAT	ROS	29	4	5	0	33	10	70.0	6.25	3.01	0.94	.304	67.9%				4.60		4.29		0.6
2026	THE BAT X	ROS	29	4	5	0	33	10	70.0	6.31	3.05	0.98	.300	68.0%				4.62		4.36		0.6
2026	OOPSY	ROS	29	4	2	0	32	10	79.0	6.45	2.86	1.00	.311	68.1%				4.58		4.24		0.7
Total	- - -	MLB		8	7	0	61	19	159.1	6.55	2.43	0.73	.294	68.3%	52.8%	9.8%	94.5	4.01	4.38	3.75	3.96	2.0

Partial SeasonsPreseason ProjectionsIn-Season ProjectionsMinor LeaguesSpring TrainingMLB Regular Season

Season	Team	Level	W W - Wins	L L - Losses	ERA ERA - Earned Run Average ((ER*9)/IP)	G G - Games Pitched	GS GS - Games Started	QS QS - Quality Starts; pitched at least 6 innings and gave up 3 or fewer earned runs	CG CG - Complete Games	ShO ShO - Shoutouts	SV SV - Saves	HLD HLD - Holds	BS BS - Blown Saves	IP IP - Innings Pitched	TBF TBF - Total Batters Faced	H H - Hits Allowed	R R - Runs Allowed	ER ER - Earned Runs	HR HR - Home Runs	BB BB - Walks	IBB IBB - Intentional	HBP HBP - Hit Batters	WP WP - Wild Pitches	BK BK - Balks	SO SO - Strikeouts
2018	LAD	R	0	0	6.23	3	0		0	0	1	0	0	4.1	21	6	3	3	1	1	0	0	1	0	3
2018	LAD	A	2	0	0.66	14	0		0	0	2	2	0	27.1	102	16	2	2	0	6	1	0	2	0	27
2018	LAD	MiLB	2	0	1.42	17	0		0	0	3	2	0	31.2	123	22	5	5	1	7	1	0	3	0	30
2019	LAD	A	7	8	5.00	27	25		0	0	0	0	0	131.1	580	143	87	73	7	48	1	6	12	0	109
2021	SEA	A	1	0	6.00	2	0		0	0	0	0	0	3.0	12	3	2	2	0	2	0	0	0	0	0
2021	SEA	A+	3	3	5.93	21	9		0	0	0	1	0	54.2	245	55	38	36	7	20	0	6	6	0	66
2021	SEA	AA	0	0	9.00	1	0		0	0	0	0	0	2.0	13	3	3	2	0	3	0	1	0	0	1
2021	SEA	MiLB	4	3	6.03	24	9		0	0	0	1	0	59.2	270	61	43	40	7	25	0	7	6	0	67
2022	SEA	AA	6	13	4.51	27	27		0	0	0	0	0	143.2	636	140	79	72	10	66	0	18	6	0	138
2023	SEA	AA	2	0	0.00	5	0		0	0	0	1	0	7.2	27	1	0	0	0	2	0	1	0	0	11
2023	SEA	AAA	4	2	4.23	44	1		0	0	4	10	3	61.2	263	51	34	29	3	30	1	3	3	0	65
2023	SEA	MiLB	6	2	3.76	49	1		0	0	4	11	3	69.1	290	52	34	29	3	32	1	4	3	0	76
2024	SDP	ST	0	0	0.00	7	0		0	0	0	3	0	6.2	29	5	0	0	0	4	0	1	0	0	7
2024	SDP	MLB	3	0	5.21	42	0	0	0	0	0	2	1	46.2	211	59	30	27	4	12	0	3	2	0	39
2025	KCR	AAA	1	3	6.63	5	5		0	0	0	0	0	19.0	96	30	15	14	2	10	0	2	2	0	20
2025	SDP	AAA	1	0	6.00	6	6		0	0	0	0	0	27.0	125	38	19	18	4	5	0	2	0	0	21
2025	---	MiLB	2	3	6.26	11	11		0	0	0	0	0	46.0	221	68	34	32	6	15	0	4	2	0	41
2025	SDP	ST	0	1	2.60	5	3		0	0	0	1	0	17.1	72	17	5	5	0	6	0	0	1	0	12
2025	2 Tms	MLB	5	7	3.51	19	19	9	1	1	0	0	0	112.2	461	98	49	44	9	31	1	7	0	0	77
2025	SDP	MLB	4	5	4.18	14	14	4	1	1	0	0	0	79.2	336	78	40	37	8	26	1	7	0	0	56
2025	KCR	MLB	1	2	1.91	5	5	5	0	0	0	0	0	33.0	125	20	9	7	1	5	0	0	0	0	21
2026	KCR	ST	1	0	4.50	1	1		0	0	0	0	0	2.0	10	3	1	1	0	1	0	0	0	0	2
2026	FGDC	PROJ	4	4	4.25	36	8	3			0	1		72.0	313	76	37	34	7	23		5			52
2026	Steamer	PROJ	4	4	4.26	36	8	4	0	0	0	1		75.0	323	81	39	35	8	23	1	4			55
2026	ZiPS	PROJ	7	7	4.23	29	24				0	1		129.7	562	130	66	61	12	42	1	10	3	0	90
2026	ZiPS DC	PROJ	4	4	4.23	36	8	3			0	1		70.0	304	70	36	33	6	23		5			49
2026	ATC	PROJ	3	3	4.30	26	7	3			0	2		60.0	260	63	31	29	6	19	1	4			43
2026	THE BAT	PROJ	2	3	4.55	26	7	0			0	1		60.0	261	63	32	30	6	20	1	4			43
2026	THE BAT X	PROJ	2	3	4.57	26	7	0			0	1		60.0	261	62	33	30	6	21	1	4			44
2026	OOPSY	PROJ	4	2	4.58	36	8	5			0	1		73.0	315	79	40	37	8	23		3			52
2026	FGDC	ROS	4	5	4.28	32	10	4			0	1		82.0	355	88	42	39	9	27		4			60
2026	Steamer	ROS	4	5	4.28	32	10	5	0	0	0	1		82.0	355	88	42	39	9	27		4			60
2026	ZiPS DC	ROS	4	4	4.23	32	10	4			0	1		78.0	338	78	40	37	7	25		6			54
2026	ATC DC	ROS	5	4	4.30	32	10	4			0	1		82.0	356	86	43	39	9	26		5			59
2026	THE BAT	ROS	4	5	4.60	33	10				0	1		70.0	302	74	38	36	7	23	1	4			48
2026	THE BAT X	ROS	4	5	4.62	33	10	3			0	1		70.0	304	73	38	36	8	24	1	4			49
2026	OOPSY	ROS	4	2	4.58	32	10	5			0	1		79.0	343	86	44	40	9	25		4			57
Total	- - -	MLB	8	7	4.01	61	19	9	1	1	0	2	1	159.1	672	157	79	71	13	43	1	10	2	0	116

Season	Team	Level	W W - Wins	L L - Losses	ERA ERA - Earned Run Average ((ER*9)/IP)	G G - Games Pitched	GS GS - Games Started	QS QS - Quality Starts; pitched at least 6 innings and gave up 3 or fewer earned runs	CG CG - Complete Games	ShO ShO - Shoutouts	SV SV - Saves	HLD HLD - Holds	BS BS - Blown Saves	IP IP - Innings Pitched	TBF TBF - Total Batters Faced	H H - Hits Allowed	R R - Runs Allowed	ER ER - Earned Runs	HR HR - Home Runs	BB BB - Walks	IBB IBB - Intentional	HBP HBP - Hit Batters	WP WP - Wild Pitches	BK BK - Balks	SO SO - Strikeouts
2018	LAD	R	0	0	6.23	3	0		0	0	1	0	0	4.1	21	6	3	3	1	1	0	0	1	0	3
2018	LAD	A	2	0	0.66	14	0		0	0	2	2	0	27.1	102	16	2	2	0	6	1	0	2	0	27
2018	LAD	MiLB	2	0	1.42	17	0		0	0	3	2	0	31.2	123	22	5	5	1	7	1	0	3	0	30
2019	LAD	A	7	8	5.00	27	25		0	0	0	0	0	131.1	580	143	87	73	7	48	1	6	12	0	109
2021	SEA	A	1	0	6.00	2	0		0	0	0	0	0	3.0	12	3	2	2	0	2	0	0	0	0	0
2021	SEA	A+	3	3	5.93	21	9		0	0	0	1	0	54.2	245	55	38	36	7	20	0	6	6	0	66
2021	SEA	AA	0	0	9.00	1	0		0	0	0	0	0	2.0	13	3	3	2	0	3	0	1	0	0	1
2021	SEA	MiLB	4	3	6.03	24	9		0	0	0	1	0	59.2	270	61	43	40	7	25	0	7	6	0	67
2022	SEA	AA	6	13	4.51	27	27		0	0	0	0	0	143.2	636	140	79	72	10	66	0	18	6	0	138
2023	SEA	AA	2	0	0.00	5	0		0	0	0	1	0	7.2	27	1	0	0	0	2	0	1	0	0	11
2023	SEA	AAA	4	2	4.23	44	1		0	0	4	10	3	61.2	263	51	34	29	3	30	1	3	3	0	65
2023	SEA	MiLB	6	2	3.76	49	1		0	0	4	11	3	69.1	290	52	34	29	3	32	1	4	3	0	76
2024	SDP	ST	0	0	0.00	7	0		0	0	0	3	0	6.2	29	5	0	0	0	4	0	1	0	0	7
2024	SDP	MLB	3	0	5.21	42	0	0	0	0	0	2	1	46.2	211	59	30	27	4	12	0	3	2	0	39
2025	KCR	AAA	1	3	6.63	5	5		0	0	0	0	0	19.0	96	30	15	14	2	10	0	2	2	0	20
2025	SDP	AAA	1	0	6.00	6	6		0	0	0	0	0	27.0	125	38	19	18	4	5	0	2	0	0	21
2025	---	MiLB	2	3	6.26	11	11		0	0	0	0	0	46.0	221	68	34	32	6	15	0	4	2	0	41
2025	SDP	ST	0	1	2.60	5	3		0	0	0	1	0	17.1	72	17	5	5	0	6	0	0	1	0	12
2025	2 Tms	MLB	5	7	3.51	19	19	9	1	1	0	0	0	112.2	461	98	49	44	9	31	1	7	0	0	77
2025	SDP	MLB	4	5	4.18	14	14	4	1	1	0	0	0	79.2	336	78	40	37	8	26	1	7	0	0	56
2025	KCR	MLB	1	2	1.91	5	5	5	0	0	0	0	0	33.0	125	20	9	7	1	5	0	0	0	0	21
2026	KCR	ST	1	0	4.50	1	1		0	0	0	0	0	2.0	10	3	1	1	0	1	0	0	0	0	2
2026	FGDC	PROJ	4	4	4.25	36	8	3			0	1		72.0	313	76	37	34	7	23		5			52
2026	Steamer	PROJ	4	4	4.26	36	8	4	0	0	0	1		75.0	323	81	39	35	8	23	1	4			55
2026	ZiPS	PROJ	7	7	4.23	29	24				0	1		129.7	562	130	66	61	12	42	1	10	3	0	90
2026	ZiPS DC	PROJ	4	4	4.23	36	8	3			0	1		70.0	304	70	36	33	6	23		5			49
2026	ATC	PROJ	3	3	4.30	26	7	3			0	2		60.0	260	63	31	29	6	19	1	4			43
2026	THE BAT	PROJ	2	3	4.55	26	7	0			0	1		60.0	261	63	32	30	6	20	1	4			43
2026	THE BAT X	PROJ	2	3	4.57	26	7	0			0	1		60.0	261	62	33	30	6	21	1	4			44
2026	OOPSY	PROJ	4	2	4.58	36	8	5			0	1		73.0	315	79	40	37	8	23		3			52
2026	FGDC	ROS	4	5	4.28	32	10	4			0	1		82.0	355	88	42	39	9	27		4			60
2026	Steamer	ROS	4	5	4.28	32	10	5	0	0	0	1		82.0	355	88	42	39	9	27		4			60
2026	ZiPS DC	ROS	4	4	4.23	32	10	4			0	1		78.0	338	78	40	37	7	25		6			54
2026	ATC DC	ROS	5	4	4.30	32	10	4			0	1		82.0	356	86	43	39	9	26		5			59
2026	THE BAT	ROS	4	5	4.60	33	10				0	1		70.0	302	74	38	36	7	23	1	4			48
2026	THE BAT X	ROS	4	5	4.62	33	10	3			0	1		70.0	304	73	38	36	8	24	1	4			49
2026	OOPSY	ROS	4	2	4.58	32	10	5			0	1		79.0	343	86	44	40	9	25		4			57
Total	- - -	MLB	8	7	4.01	61	19	9	1	1	0	2	1	159.1	672	157	79	71	13	43	1	10	2	0	116

Partial SeasonsPreseason ProjectionsIn-Season ProjectionsMinor LeaguesSpring TrainingMLB Regular SeasonAverages

Season	Team	Level	K/9 K/9 - Strikeouts per 9 Innings ((SO*9)/IP)	BB/9 BB/9 - Walks per 9 Innings ((BB*9)/IP)	K/BB K/BB - Strikeout to Walk Ratio (SO/BB)	HR/9 HR/9 - Home Runs per 9 Innings ((HR*9)/IP)	K% K% - Strikeout Percentage (SO/TBF)	BB% BB% - Walk Percentage (BB/TBF)	K-BB% K-BB% - The difference between strikeout percentage and walk percentage	AVG AVG - Batting Average Against	WHIP WHIP - Walks + Hits divided by Innings Pitched	BABIP BABIP - Batting Average on Balls in Play	LOB% LOB% - Left on Base Percentage	ERA- ERA- - ERA adjusted for park and league where 100 is average and lower is better	FIP- FIP- - FIP adjusted for park and league where 100 is average and lower is better	FIP FIP - Fielder Independent Pitching on an ERA scale
2018	LAD	R	6.23	2.08	3.00	2.08	14.3%	4.8%	9.5%	.300	1.62	.313	71.4%	125	130	6.64
2018	LAD	A	8.89	1.98	4.50	0.00	26.5%	5.9%	20.6%	.167	0.80	.232	90.9%	18	58	2.16
2018	LAD	MiLB	8.53	1.99	4.29	0.28	24.4%	5.7%	18.7%	.190	0.92	.247	87.0%	33	68	2.78
2019	LAD	A	7.47	3.29	2.27	0.48	18.8%	8.3%	10.5%	.272	1.45	.332	58.8%	140	101	3.71
2021	SEA	A	0.00	6.00	0.00	0.00	0.0%	16.7%	-16.7%	.300	1.67	.300	60.0%	128	136	6.23
2021	SEA	A+	10.87	3.29	3.30	1.15	26.9%	8.2%	18.8%	.251	1.37	.329	60.4%	119	94	4.66
2021	SEA	AA	4.50	13.50	0.33	0.00	7.7%	23.1%	-15.4%	.333	3.00	.375	57.1%	223	202	8.48
2021	SEA	MiLB	10.11	3.77	2.68	1.06	24.8%	9.3%	15.6%	.256	1.44	.329	60.1%	123	100	4.86
2022	SEA	AA	8.65	4.13	2.09	0.63	21.7%	10.4%	11.3%	.254	1.43	.322	69.0%	100	95	4.50
2023	SEA	AA	12.91	2.35	5.50	0.00	40.7%	7.4%	33.3%	.042	0.39	.077	100.0%	0	45	2.00
2023	SEA	AAA	9.49	4.38	2.17	0.44	24.7%	11.4%	13.3%	.222	1.31	.296	62.7%	77	71	4.08
2023	SEA	MiLB	9.87	4.15	2.38	0.39	26.2%	11.0%	15.2%	.205	1.21	.280	64.4%	69	68	3.85
2024	SDP	ST	9.45	5.40	1.75	0.00	24.1%	13.8%	10.3%	.208	1.35	.294	100.0%	0	86	3.89
2024	SDP	MLB	7.52	2.31	3.25	0.77	18.5%	5.7%	12.8%	.301	1.52	.359	64.3%	131	89	3.57
2024			8.60	3.12	2.76	1.14	22.6%	8.2%	14.4%	.241	1.27	.289	72.1%			4.11
2025	KCR	AAA	9.47	4.74	2.00	0.95	20.8%	10.4%	10.4%	.357	2.11	.452	68.9%	137	96	4.65
2025	SDP	AAA	7.00	1.67	4.20	1.33	16.8%	4.0%	12.8%	.322	1.59	.366	66.0%	103	90	5.11
2025	---	MiLB	8.02	2.93	2.73	1.17	18.6%	6.8%	11.8%	.337	1.80	.400	67.4%	117	93	4.92
2025	SDP	ST	6.23	3.12	2.00	0.00	16.7%	8.3%	8.3%	.258	1.33	.315	78.3%	51	71	3.39
2025	2 Tms	MLB	6.15	2.48	2.48	0.72	16.7%	6.7%	10.0%	.232	1.14	.264	70.5%	86	93	3.82
2025	SDP	MLB	6.33	2.94	2.15	0.90	16.7%	7.7%	8.9%	.257	1.31	.293	71.1%	103	104	4.28
2025	KCR	MLB	5.73	1.36	4.20	0.27	16.8%	4.0%	12.8%	.167	0.76	.194	67.8%	45	64	2.71
2025			8.49	3.21	2.64	1.18	22.2%	8.4%	13.8%	.242	1.29	.289	72.3%			4.22
2026	KCR	ST	9.00	4.50	2.00	0.00	20.0%	10.0%	10.0%	.333	2.00	.429	75.0%	95	64	3.15
2026	FGDC	PROJ	6.41	2.83	2.27	0.91	16.5%	7.3%	9.2%	.265	1.36	.301	69.5%			4.16
2026	Steamer	PROJ	6.57	2.75	2.39	0.98	16.9%	7.1%	9.8%	.274	1.39	.312	70.7%			4.16
2026	ZiPS	PROJ	6.25	2.91	2.14	0.83	16.0%	7.5%	8.5%	.255	1.33	.289	68.3%			4.15
2026	ZiPS DC	PROJ	6.25	2.91	2.14	0.83	16.0%	7.5%	8.5%	.255	1.33	.289	68.3%			4.15
2026	ATC	PROJ	6.50	2.79	2.33	0.92	16.7%	7.2%	9.5%	.265	1.36	.302	69.1%			4.13
2026	THE BAT	PROJ	6.44	3.04	2.12	0.92	16.4%	7.7%	8.7%	.265	1.38	.301	68.0%			4.24
2026	THE BAT X	PROJ	6.53	3.08	2.12	0.96	16.7%	7.9%	8.8%	.263	1.38	.300	68.1%			4.29
2026	OOPSY	PROJ	6.45	2.86	2.25	1.00	16.5%	7.3%	9.2%	.275	1.41	.311	68.1%			4.24
2026	FGDC	ROS	6.57	2.96	2.22	0.94	16.8%	7.6%	9.2%	.273	1.41	.312	70.6%			4.18
2026	Steamer	ROS	6.57	2.96	2.22	0.94	16.8%	7.6%	9.2%	.273	1.41	.312	70.6%			4.18
2026	ZiPS DC	ROS	6.25	2.91	2.14	0.83	16.0%	7.5%	8.5%	.255	1.33	.289	68.3%			4.15
2026	ATC DC	ROS	6.51	2.80	2.33	0.96	16.7%	7.2%	9.5%	.265	1.36	.301	69.4%			4.19
2026	THE BAT	ROS	6.25	3.01	2.08	0.94	16.0%	7.7%	8.3%	.269	1.40	.304	67.9%			4.29
2026	THE BAT X	ROS	6.31	3.05	2.07	0.98	16.1%	7.8%	8.3%	.266	1.39	.300	68.0%			4.36
2026	OOPSY	ROS	6.45	2.86	2.25	1.00	16.5%	7.3%	9.2%	.275	1.41	.311	68.1%			4.24
Total	- - -	MLB	6.55	2.43	2.70	0.73	17.3%	6.4%	10.9%	.254	1.26	.294	68.3%	99	91	3.75

Season	Team	Level	K/9 K/9 - Strikeouts per 9 Innings ((SO*9)/IP)	BB/9 BB/9 - Walks per 9 Innings ((BB*9)/IP)	K/BB K/BB - Strikeout to Walk Ratio (SO/BB)	HR/9 HR/9 - Home Runs per 9 Innings ((HR*9)/IP)	K% K% - Strikeout Percentage (SO/TBF)	BB% BB% - Walk Percentage (BB/TBF)	K-BB% K-BB% - The difference between strikeout percentage and walk percentage	AVG AVG - Batting Average Against	WHIP WHIP - Walks + Hits divided by Innings Pitched	BABIP BABIP - Batting Average on Balls in Play	LOB% LOB% - Left on Base Percentage	ERA- ERA- - ERA adjusted for park and league where 100 is average and lower is better	FIP- FIP- - FIP adjusted for park and league where 100 is average and lower is better	FIP FIP - Fielder Independent Pitching on an ERA scale
2018	LAD	R	6.23	2.08	3.00	2.08	14.3%	4.8%	9.5%	.300	1.62	.313	71.4%	125	130	6.64
2018	LAD	A	8.89	1.98	4.50	0.00	26.5%	5.9%	20.6%	.167	0.80	.232	90.9%	18	58	2.16
2018	LAD	MiLB	8.53	1.99	4.29	0.28	24.4%	5.7%	18.7%	.190	0.92	.247	87.0%	33	68	2.78
2019	LAD	A	7.47	3.29	2.27	0.48	18.8%	8.3%	10.5%	.272	1.45	.332	58.8%	140	101	3.71
2021	SEA	A	0.00	6.00	0.00	0.00	0.0%	16.7%	-16.7%	.300	1.67	.300	60.0%	128	136	6.23
2021	SEA	A+	10.87	3.29	3.30	1.15	26.9%	8.2%	18.8%	.251	1.37	.329	60.4%	119	94	4.66
2021	SEA	AA	4.50	13.50	0.33	0.00	7.7%	23.1%	-15.4%	.333	3.00	.375	57.1%	223	202	8.48
2021	SEA	MiLB	10.11	3.77	2.68	1.06	24.8%	9.3%	15.6%	.256	1.44	.329	60.1%	123	100	4.86
2022	SEA	AA	8.65	4.13	2.09	0.63	21.7%	10.4%	11.3%	.254	1.43	.322	69.0%	100	95	4.50
2023	SEA	AA	12.91	2.35	5.50	0.00	40.7%	7.4%	33.3%	.042	0.39	.077	100.0%	0	45	2.00
2023	SEA	AAA	9.49	4.38	2.17	0.44	24.7%	11.4%	13.3%	.222	1.31	.296	62.7%	77	71	4.08
2023	SEA	MiLB	9.87	4.15	2.38	0.39	26.2%	11.0%	15.2%	.205	1.21	.280	64.4%	69	68	3.85
2024	SDP	ST	9.45	5.40	1.75	0.00	24.1%	13.8%	10.3%	.208	1.35	.294	100.0%	0	86	3.89
2024	SDP	MLB	7.52	2.31	3.25	0.77	18.5%	5.7%	12.8%	.301	1.52	.359	64.3%	131	89	3.57
2024			8.60	3.12	2.76	1.14	22.6%	8.2%	14.4%	.241	1.27	.289	72.1%			4.11
2025	KCR	AAA	9.47	4.74	2.00	0.95	20.8%	10.4%	10.4%	.357	2.11	.452	68.9%	137	96	4.65
2025	SDP	AAA	7.00	1.67	4.20	1.33	16.8%	4.0%	12.8%	.322	1.59	.366	66.0%	103	90	5.11
2025	---	MiLB	8.02	2.93	2.73	1.17	18.6%	6.8%	11.8%	.337	1.80	.400	67.4%	117	93	4.92
2025	SDP	ST	6.23	3.12	2.00	0.00	16.7%	8.3%	8.3%	.258	1.33	.315	78.3%	51	71	3.39
2025	2 Tms	MLB	6.15	2.48	2.48	0.72	16.7%	6.7%	10.0%	.232	1.14	.264	70.5%	86	93	3.82
2025	SDP	MLB	6.33	2.94	2.15	0.90	16.7%	7.7%	8.9%	.257	1.31	.293	71.1%	103	104	4.28
2025	KCR	MLB	5.73	1.36	4.20	0.27	16.8%	4.0%	12.8%	.167	0.76	.194	67.8%	45	64	2.71
2025			8.49	3.21	2.64	1.18	22.2%	8.4%	13.8%	.242	1.29	.289	72.3%			4.22
2026	KCR	ST	9.00	4.50	2.00	0.00	20.0%	10.0%	10.0%	.333	2.00	.429	75.0%	95	64	3.15
2026	FGDC	PROJ	6.41	2.83	2.27	0.91	16.5%	7.3%	9.2%	.265	1.36	.301	69.5%			4.16
2026	Steamer	PROJ	6.57	2.75	2.39	0.98	16.9%	7.1%	9.8%	.274	1.39	.312	70.7%			4.16
2026	ZiPS	PROJ	6.25	2.91	2.14	0.83	16.0%	7.5%	8.5%	.255	1.33	.289	68.3%			4.15
2026	ZiPS DC	PROJ	6.25	2.91	2.14	0.83	16.0%	7.5%	8.5%	.255	1.33	.289	68.3%			4.15
2026	ATC	PROJ	6.50	2.79	2.33	0.92	16.7%	7.2%	9.5%	.265	1.36	.302	69.1%			4.13
2026	THE BAT	PROJ	6.44	3.04	2.12	0.92	16.4%	7.7%	8.7%	.265	1.38	.301	68.0%			4.24
2026	THE BAT X	PROJ	6.53	3.08	2.12	0.96	16.7%	7.9%	8.8%	.263	1.38	.300	68.1%			4.29
2026	OOPSY	PROJ	6.45	2.86	2.25	1.00	16.5%	7.3%	9.2%	.275	1.41	.311	68.1%			4.24
2026	FGDC	ROS	6.57	2.96	2.22	0.94	16.8%	7.6%	9.2%	.273	1.41	.312	70.6%			4.18
2026	Steamer	ROS	6.57	2.96	2.22	0.94	16.8%	7.6%	9.2%	.273	1.41	.312	70.6%			4.18
2026	ZiPS DC	ROS	6.25	2.91	2.14	0.83	16.0%	7.5%	8.5%	.255	1.33	.289	68.3%			4.15
2026	ATC DC	ROS	6.51	2.80	2.33	0.96	16.7%	7.2%	9.5%	.265	1.36	.301	69.4%			4.19
2026	THE BAT	ROS	6.25	3.01	2.08	0.94	16.0%	7.7%	8.3%	.269	1.40	.304	67.9%			4.29
2026	THE BAT X	ROS	6.31	3.05	2.07	0.98	16.1%	7.8%	8.3%	.266	1.39	.300	68.0%			4.36
2026	OOPSY	ROS	6.45	2.86	2.25	1.00	16.5%	7.3%	9.2%	.275	1.41	.311	68.1%			4.24
Total	- - -	MLB	6.55	2.43	2.70	0.73	17.3%	6.4%	10.9%	.254	1.26	.294	68.3%	99	91	3.75

Partial SeasonsPreseason ProjectionsIn-Season ProjectionsMinor LeaguesSpring TrainingMLB Regular Season

Season	Team	Level	Events Events - The number of Batted Balls (TBF - SO - BB - HBP)	EV EV - Exit Velocity (mph) - Speed of the baseball as it comes off the bat	maxEV maxEV - Maximum Exit Velocity (mph) - Highest speed of a ball off the bat.	LA LA - Launch Angle (degree) - Vertical direction of the ball as it leaves the bat	Barrels Barrels - A batted ball with comparable hit types (in terms of exit velocity and launch angle) have led to a minimum .500 batting average and 1.500 slugging percentage	Barrel% Barrel% - Percentage of batted balls that are classified as barrels	HardHit HardHit - Number of batted balls with exit velocity of 95 mph or higher	HardHit% HardHit% - Percentage of batted balls with exit velocity of 95 mph or higher	ERA ERA - Earned Run Average ((ER*9)/IP)	xERA xERA - Expected ERA
2023	SEA	AAA	165	85.1	112.4	2.0	0		57	34.5%	4.23
2024	SDP	MLB	157	88.1	113.5	3.6	6	3.8%	64	40.8%	5.21	4.58
2025	KCR	AAA	64	89.5	111.8	9.0	0		24	37.5%	6.63
2025	SDP	AAA	97	88.8	109.1	3.9	0		43	44.3%	6.00
2025	2 Tms	MLB	346	91.1	111.9	7.4	21	6.1%	166	48.0%	3.51	4.30
2025	SDP	MLB	247	91.4	111.9	8.1	14	5.7%	119	48.2%	4.18	4.48
2025	KCR	MLB	99	90.5	110.5	5.7	7	7.1%	47	47.5%	1.91	3.83
2026	KCR	ST	7	98.6	108.8	-10.0	0	0.0%	4	57.1%	4.50
Total	- - -	MLB	503	90.2	113.5	6.3	27	5.4%	230	45.7%	4.01	4.38

Season	Team	Level	Events Events - The number of Batted Balls (TBF - SO - BB - HBP)	EV EV - Exit Velocity (mph) - Speed of the baseball as it comes off the bat	maxEV maxEV - Maximum Exit Velocity (mph) - Highest speed of a ball off the bat.	LA LA - Launch Angle (degree) - Vertical direction of the ball as it leaves the bat	Barrels Barrels - A batted ball with comparable hit types (in terms of exit velocity and launch angle) have led to a minimum .500 batting average and 1.500 slugging percentage	Barrel% Barrel% - Percentage of batted balls that are classified as barrels	HardHit HardHit - Number of batted balls with exit velocity of 95 mph or higher	HardHit% HardHit% - Percentage of batted balls with exit velocity of 95 mph or higher	ERA ERA - Earned Run Average ((ER*9)/IP)	xERA xERA - Expected ERA
2023	SEA	AAA	165	85.1	112.4	2.0	0		57	34.5%	4.23
2024	SDP	MLB	157	88.1	113.5	3.6	6	3.8%	64	40.8%	5.21	4.58
2025	KCR	AAA	64	89.5	111.8	9.0	0		24	37.5%	6.63
2025	SDP	AAA	97	88.8	109.1	3.9	0		43	44.3%	6.00
2025	2 Tms	MLB	346	91.1	111.9	7.4	21	6.1%	166	48.0%	3.51	4.30
2025	SDP	MLB	247	91.4	111.9	8.1	14	5.7%	119	48.2%	4.18	4.48
2025	KCR	MLB	99	90.5	110.5	5.7	7	7.1%	47	47.5%	1.91	3.83
2026	KCR	ST	7	98.6	108.8	-10.0	0	0.0%	4	57.1%	4.50
Total	- - -	MLB	503	90.2	113.5	6.3	27	5.4%	230	45.7%	4.01	4.38

Stephen Kolek

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BAL	CHW	ATH
BOS	CLE	HOU
NYY	DET	LAA
TBR	KCR	SEA
TOR	MIN	TEX

ATL	CHC	ARI
MIA	CIN	COL
NYM	MIL	LAD
PHI	PIT	SDP
WSN	STL	SFG