Stephen Kolek

Kansas City Royals (AAA)

Age: 29

Bats/Throws: R/R

6'3" / 210

DOB: 4/18/1997

(29 years, 3 months, 20 days)

Player Dashboard:

Stats

Off

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	4.29	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	4.29	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	5.06	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	4.62	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	4.82	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	KCR	AAA	29	0	1	0	5	5	19.0	8.05	1.89	0.47	.400	73.4%	56.7%	9.1%		3.32	4.10	3.22	3.59
2026	KCR	MLB	29	4	3	0	10	10	54.0	5.67	2.00	1.33	.280	67.5%	45.7%	14.0%	94.3	4.50	3.82	4.54	4.22	0.5
2026	Steamer	ROS	29	0	0	0	0	0	1.0	6.20	2.75	1.05	.314	69.6%				4.54		4.31		0.0
2026	ZiPS	ROS	29	2	2		7	6	32.0	6.16	2.72	0.96	.296	67.3%				4.45		4.22		0.3
Total	- - -	MLB		12	10	0	71	29	213.1	6.33	2.32	0.89	.290	68.1%	51.0%	11.1%	94.4	4.13	4.24	3.95	4.02	2.4

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	4.29	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	4.29	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	5.06	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	4.62	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	4.82	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	KCR	AAA	29	0	1	0	5	5	19.0	8.05	1.89	0.47	.400	73.4%	56.7%	9.1%		3.32	4.10	3.22	3.59
2026	KCR	MLB	29	4	3	0	10	10	54.0	5.67	2.00	1.33	.280	67.5%	45.7%	14.0%	94.3	4.50	3.82	4.54	4.22	0.5
2026	Steamer	ROS	29	0	0	0	0	0	1.0	6.20	2.75	1.05	.314	69.6%				4.54		4.31		0.0
2026	ZiPS	ROS	29	2	2		7	6	32.0	6.16	2.72	0.96	.296	67.3%				4.45		4.22		0.3
Total	- - -	MLB		12	10	0	71	29	213.1	6.33	2.32	0.89	.290	68.1%	51.0%	11.1%	94.4	4.13	4.24	3.95	4.02	2.4

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	KCR	AAA	0	1	3.32	5	5		0	0	0	0	0	19.0	83	25	9	7	1	4	0	1	0	2	17
2026	KCR	MLB	4	3	4.50	10	10	5	1	1	0	0	0	54.0	224	55	30	27	8	12	0	2	2	0	34
2026	Steamer	ROS	0	0	4.54	0	0	0	0	0	0	0		1.0	4	1	1	1	0	0		0			1
2026	ZiPS	ROS	2	2	4.45	7	6							32.0	138	33	17	16	3	10		2			22
Total	- - -	MLB	12	10	4.13	71	29	14	2	2	0	2	1	213.1	896	212	109	98	21	55	1	12	4	0	150

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	KCR	AAA	0	1	3.32	5	5		0	0	0	0	0	19.0	83	25	9	7	1	4	0	1	0	2	17
2026	KCR	MLB	4	3	4.50	10	10	5	1	1	0	0	0	54.0	224	55	30	27	8	12	0	2	2	0	34
2026	Steamer	ROS	0	0	4.54	0	0	0	0	0	0	0		1.0	4	1	1	1	0	0		0			1
2026	ZiPS	ROS	2	2	4.45	7	6							32.0	138	33	17	16	3	10		2			22
Total	- - -	MLB	12	10	4.13	71	29	14	2	2	0	2	1	213.1	896	212	109	98	21	55	1	12	4	0	150

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	KCR	AAA	8.05	1.89	4.25	0.47	20.5%	4.8%	15.7%	.321	1.53	.400	73.4%	65	63	3.22
2026	KCR	MLB	5.67	2.00	2.83	1.33	15.2%	5.4%	9.8%	.262	1.24	.280	67.5%	105	110	4.54
2026			8.51	3.42	2.49	1.17	22.2%	8.9%	13.3%	.241	1.30	.287	72.3%			4.29
2026	Steamer	ROS	6.20	2.75	2.25	1.05	15.8%	7.0%	8.8%	.280	1.43	.314	69.6%			4.31
2026	ZiPS	ROS	6.16	2.72	2.26	0.96	15.9%	7.0%	8.9%	.264	1.34	.296	67.3%			4.22
Total	- - -	MLB	6.33	2.32	2.73	0.89	16.7%	6.1%	10.6%	.256	1.25	.290	68.1%	101	96	3.95

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	KCR	AAA	8.05	1.89	4.25	0.47	20.5%	4.8%	15.7%	.321	1.53	.400	73.4%	65	63	3.22
2026	KCR	MLB	5.67	2.00	2.83	1.33	15.2%	5.4%	9.8%	.262	1.24	.280	67.5%	105	110	4.54
2026			8.51	3.42	2.49	1.17	22.2%	8.9%	13.3%	.241	1.30	.287	72.3%			4.29
2026	Steamer	ROS	6.20	2.75	2.25	1.05	15.8%	7.0%	8.8%	.280	1.43	.314	69.6%			4.31
2026	ZiPS	ROS	6.16	2.72	2.26	0.96	15.9%	7.0%	8.9%	.264	1.34	.296	67.3%			4.22
Total	- - -	MLB	6.33	2.32	2.73	0.89	16.7%	6.1%	10.6%	.256	1.25	.290	68.1%	101	96	3.95

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	7	4.2%	57	34.5%	4.23	4.29
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	5	7.8%	24	37.5%	6.63	5.06
2025	SDP	AAA	97	88.8	109.1	3.9	3	3.1%	43	44.3%	6.00	4.62
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
2026	KCR	AAA	61	86.4	109.5	2.5	1	1.6%	20	32.8%	3.32	4.10
2026	KCR	MLB	176	88.5	112.8	10.3	12	6.8%	65	36.9%	4.50	3.82
Total	- - -	MLB	679	89.8	113.5	7.3	39	5.7%	295	43.4%	4.13	4.24

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	7	4.2%	57	34.5%	4.23	4.29
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	5	7.8%	24	37.5%	6.63	5.06
2025	SDP	AAA	97	88.8	109.1	3.9	3	3.1%	43	44.3%	6.00	4.62
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
2026	KCR	AAA	61	86.4	109.5	2.5	1	1.6%	20	32.8%	3.32	4.10
2026	KCR	MLB	176	88.5	112.8	10.3	12	6.8%	65	36.9%	4.50	3.82
Total	- - -	MLB	679	89.8	113.5	7.3	39	5.7%	295	43.4%	4.13	4.24

Stephen Kolek

Stats

Dashboard

Standard

Advanced

Statcast

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