Stephen Kolek

Kansas City Royals (AAA)

Age: 28

Bats/Throws: R/R

6'3" / 210

DOB: 4/18/1997

(28 years, 3 months, 29 days)

Stats

Preseason 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	4.46	3.57	3.46	0.3
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	FGDC	PROJ	28	4	5	0	41	8	80.0	7.19	3.28	0.98	.293	69.6%				4.28		4.31		0.5
2025	Steamer	PROJ	28	4	5	0	41	8	79.0	7.04	3.35	1.06	.298	71.9%	49.6%			4.18		4.42	4.30	0.3
2025	ZiPS	PROJ	28	4	4	0	35	7	70.0	7.33	3.21	0.90	.288	67.3%				4.37		4.21		0.5
2025	ZiPS DC	PROJ	28	5	5	0	41	8	82.0	7.33	3.21	0.90	.288	67.3%				4.37		4.21		0.6
2025	ATC	PROJ	28	4	2	0	30	6	60.0	7.15	3.00	0.98	.312	67.8%				4.59		4.19		0.4
2025	OOPSY	PROJ	28	2	2	0	41	8	79.0	7.93	3.35	0.90	.289	72.6%				3.85		3.96		0.7
2025	KCR	AAA	28	1	1	0	2	2	12.1	7.30	0.73	0.73	.415	79.5%	57.1%	10.0%		2.92		3.18	3.52
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		5.12	4.37
2025	---	MiLB	28	2	1	0	8	8	39.1	7.09	1.37	1.14	.381	70.2%	56.9%	18.5%		5.03		4.51	4.10
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	4.34	4.25	4.37	0.8
2025	FGDC	ROS	28	1	1	0	10	1	13.0	6.79	2.90	0.91	.307	68.7%				4.32		4.12		0.1
2025	Steamer	ROS	28	1	1	0	10	1	13.0	6.65	2.69	0.91	.312	70.8%				4.13		4.02		0.1
2025	ZiPS	ROS	28	1	1		7	3	20.0	6.94	3.12	0.91	.301	66.6%				4.52		4.21		0.2
2025	ZiPS DC	ROS	28	1	1	0	10	1	13.0	6.94	3.12	0.91	.301	66.6%				4.52		4.21		0.1
2025	ATC DC	ROS	28	1	1	0	10	1	14.0	6.79	2.97	0.87	.308	68.5%				4.39		4.04		0.1
2025	THE BAT	ROS	28	1	1	0	10	1	13.0	6.94	3.09	0.92	.308	67.9%				4.57		4.13		0.1
2025	OOPSY	ROS	28	0	0	0	10	1	13.0	6.67	2.78	0.97	.313	68.0%				4.51		4.09		0.1
Total	- - -	MLB		7	5	0	56	14	126.1	6.77	2.71	0.85	.319	68.4%	52.6%	11.3%	94.5	4.56		4.00	4.04	1.1

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	4.46	3.57	3.46	0.3
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	FGDC	PROJ	28	4	5	0	41	8	80.0	7.19	3.28	0.98	.293	69.6%				4.28		4.31		0.5
2025	Steamer	PROJ	28	4	5	0	41	8	79.0	7.04	3.35	1.06	.298	71.9%	49.6%			4.18		4.42	4.30	0.3
2025	ZiPS	PROJ	28	4	4	0	35	7	70.0	7.33	3.21	0.90	.288	67.3%				4.37		4.21		0.5
2025	ZiPS DC	PROJ	28	5	5	0	41	8	82.0	7.33	3.21	0.90	.288	67.3%				4.37		4.21		0.6
2025	ATC	PROJ	28	4	2	0	30	6	60.0	7.15	3.00	0.98	.312	67.8%				4.59		4.19		0.4
2025	OOPSY	PROJ	28	2	2	0	41	8	79.0	7.93	3.35	0.90	.289	72.6%				3.85		3.96		0.7
2025	KCR	AAA	28	1	1	0	2	2	12.1	7.30	0.73	0.73	.415	79.5%	57.1%	10.0%		2.92		3.18	3.52
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		5.12	4.37
2025	---	MiLB	28	2	1	0	8	8	39.1	7.09	1.37	1.14	.381	70.2%	56.9%	18.5%		5.03		4.51	4.10
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	4.34	4.25	4.37	0.8
2025	FGDC	ROS	28	1	1	0	10	1	13.0	6.79	2.90	0.91	.307	68.7%				4.32		4.12		0.1
2025	Steamer	ROS	28	1	1	0	10	1	13.0	6.65	2.69	0.91	.312	70.8%				4.13		4.02		0.1
2025	ZiPS	ROS	28	1	1		7	3	20.0	6.94	3.12	0.91	.301	66.6%				4.52		4.21		0.2
2025	ZiPS DC	ROS	28	1	1	0	10	1	13.0	6.94	3.12	0.91	.301	66.6%				4.52		4.21		0.1
2025	ATC DC	ROS	28	1	1	0	10	1	14.0	6.79	2.97	0.87	.308	68.5%				4.39		4.04		0.1
2025	THE BAT	ROS	28	1	1	0	10	1	13.0	6.94	3.09	0.92	.308	67.9%				4.57		4.13		0.1
2025	OOPSY	ROS	28	0	0	0	10	1	13.0	6.67	2.78	0.97	.313	68.0%				4.51		4.09		0.1
Total	- - -	MLB		7	5	0	56	14	126.1	6.77	2.71	0.85	.319	68.4%	52.6%	11.3%	94.5	4.56		4.00	4.04	1.1

Preseason 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	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	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	FGDC	PROJ	4	5	4.28	41	8	3			0	1		80.0	350	80	42	38	9	29		6			64
2025	Steamer	PROJ	4	5	4.18	41	8	4	0	0	0	1		79.0	342	80	40	37	9	29	1	4			62
2025	ZiPS	PROJ	4	4	4.37	35	7				0	1		70.0	308	68	37	34	7	25	0	7	3	0	57
2025	ZiPS DC	PROJ	5	5	4.37	41	8	3			0	1		82.0	359	79	43	40	8	29		8			66
2025	ATC	PROJ	4	2	4.59	30	6	2			0	1		60.0	263	64	33	31	7	20	0	4			48
2025	OOPSY	PROJ	2	2	3.85	41	8	5			0	1		79.0	346	76	37	34	8	29		4			70
2025	KCR	AAA	1	1	2.92	2	2		0	0	0	0	0	12.1	53	18	5	4	1	1	0	0	1	0	10
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	1	5.03	8	8		0	0	0	0	0	39.1	178	56	24	22	5	6	0	2	1	0	31
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	FGDC	ROS	1	1	4.32	10	1	0			0	0		13.0	58	14	7	6	1	4		1			10
2025	Steamer	ROS	1	1	4.13	10	1	0	0	0	0	0		13.0	58	14	7	6	1	4		1			10
2025	ZiPS	ROS	1	1	4.52	7	3							20.0	87	20	11	10	2	7		2			16
2025	ZiPS DC	ROS	1	1	4.52	10	1	0			0	0		13.0	58	14	7	7	1	5		1			10
2025	ATC DC	ROS	1	1	4.39	10	1	0			0	0		14.0	62	15	8	7	1	5		1			11
2025	THE BAT	ROS	1	1	4.57	10	1				0	0		13.0	57	14	7	7	1	4	0	1			10
2025	OOPSY	ROS	0	0	4.51	10	1	1			0	0		13.0	57	14	7	7	1	4		1			10
Total	- - -	MLB	7	5	4.56	56	14	4	1	1	0	2	1	126.1	547	137	70	64	12	38	1	10	2	0	95

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	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	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	FGDC	PROJ	4	5	4.28	41	8	3			0	1		80.0	350	80	42	38	9	29		6			64
2025	Steamer	PROJ	4	5	4.18	41	8	4	0	0	0	1		79.0	342	80	40	37	9	29	1	4			62
2025	ZiPS	PROJ	4	4	4.37	35	7				0	1		70.0	308	68	37	34	7	25	0	7	3	0	57
2025	ZiPS DC	PROJ	5	5	4.37	41	8	3			0	1		82.0	359	79	43	40	8	29		8			66
2025	ATC	PROJ	4	2	4.59	30	6	2			0	1		60.0	263	64	33	31	7	20	0	4			48
2025	OOPSY	PROJ	2	2	3.85	41	8	5			0	1		79.0	346	76	37	34	8	29		4			70
2025	KCR	AAA	1	1	2.92	2	2		0	0	0	0	0	12.1	53	18	5	4	1	1	0	0	1	0	10
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	1	5.03	8	8		0	0	0	0	0	39.1	178	56	24	22	5	6	0	2	1	0	31
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	FGDC	ROS	1	1	4.32	10	1	0			0	0		13.0	58	14	7	6	1	4		1			10
2025	Steamer	ROS	1	1	4.13	10	1	0	0	0	0	0		13.0	58	14	7	6	1	4		1			10
2025	ZiPS	ROS	1	1	4.52	7	3							20.0	87	20	11	10	2	7		2			16
2025	ZiPS DC	ROS	1	1	4.52	10	1	0			0	0		13.0	58	14	7	7	1	5		1			10
2025	ATC DC	ROS	1	1	4.39	10	1	0			0	0		14.0	62	15	8	7	1	5		1			11
2025	THE BAT	ROS	1	1	4.57	10	1				0	0		13.0	57	14	7	7	1	4	0	1			10
2025	OOPSY	ROS	0	0	4.51	10	1	1			0	0		13.0	57	14	7	7	1	4		1			10
Total	- - -	MLB	7	5	4.56	56	14	4	1	1	0	2	1	126.1	547	137	70	64	12	38	1	10	2	0	95

Preseason 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%	127	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%	120	95	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	SDP	ST	6.23	3.12	2.00	0.00	16.7%	8.3%	8.3%	.258	1.33	.315	78.3%	50	71	3.39
2025	FGDC	PROJ	7.19	3.28	2.19	0.98	18.3%	8.4%	10.0%	.253	1.35	.293	69.6%			4.31
2025	Steamer	PROJ	7.04	3.35	2.10	1.06	18.1%	8.6%	9.5%	.259	1.38	.298	71.9%			4.42
2025	ZiPS	PROJ	7.33	3.21	2.28	0.90	18.5%	8.1%	10.4%	.246	1.33	.288	67.3%			4.21
2025	ZiPS DC	PROJ	7.33	3.21	2.28	0.90	18.5%	8.1%	10.4%	.246	1.33	.288	67.3%			4.21
2025	ATC	PROJ	7.15	3.00	2.38	0.98	18.2%	7.6%	10.5%	.268	1.40	.312	67.8%			4.19
2025	OOPSY	PROJ	7.93	3.35	2.37	0.90	20.1%	8.5%	11.6%	.242	1.33	.289	72.6%			3.96
2025	KCR	AAA	7.30	0.73	10.00	0.73	18.9%	1.9%	17.0%	.346	1.54	.415	79.5%	61	66	3.18
2025	SDP	AAA	7.00	1.67	4.20	1.33	16.8%	4.0%	12.8%	.322	1.59	.366	66.0%	101	90	5.12
2025	---	MiLB	7.09	1.37	5.17	1.14	17.4%	3.4%	14.0%	.329	1.58	.381	70.2%	88	82	4.51
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	4.25
2025			8.38	3.23	2.60	1.16	21.9%	8.4%	13.5%	.243	1.29	.289	72.5%			4.22
2025	FGDC	ROS	6.79	2.90	2.34	0.91	17.5%	7.5%	10.0%	.266	1.36	.307	68.7%			4.12
2025	Steamer	ROS	6.65	2.69	2.47	0.91	17.1%	6.9%	10.2%	.272	1.37	.312	70.8%			4.02
2025	ZiPS	ROS	6.94	3.12	2.23	0.91	17.8%	8.0%	9.8%	.260	1.35	.301	66.6%			4.21
2025	ZiPS DC	ROS	6.94	3.12	2.23	0.91	17.8%	8.0%	9.8%	.260	1.35	.301	66.6%			4.21
2025	ATC DC	ROS	6.79	2.97	2.29	0.87	17.3%	7.6%	9.7%	.267	1.39	.308	68.5%			4.04
2025	THE BAT	ROS	6.94	3.09	2.24	0.92	17.7%	7.9%	9.8%	.266	1.39	.308	67.9%			4.13
2025	OOPSY	ROS	6.67	2.78	2.39	0.97	17.1%	7.2%	10.0%	.273	1.39	.313	68.0%			4.09
Total	- - -	MLB	6.77	2.71	2.50	0.85	17.4%	6.9%	10.4%	.275	1.39	.319	68.4%	113	99	4.00

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%	127	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%	120	95	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	SDP	ST	6.23	3.12	2.00	0.00	16.7%	8.3%	8.3%	.258	1.33	.315	78.3%	50	71	3.39
2025	FGDC	PROJ	7.19	3.28	2.19	0.98	18.3%	8.4%	10.0%	.253	1.35	.293	69.6%			4.31
2025	Steamer	PROJ	7.04	3.35	2.10	1.06	18.1%	8.6%	9.5%	.259	1.38	.298	71.9%			4.42
2025	ZiPS	PROJ	7.33	3.21	2.28	0.90	18.5%	8.1%	10.4%	.246	1.33	.288	67.3%			4.21
2025	ZiPS DC	PROJ	7.33	3.21	2.28	0.90	18.5%	8.1%	10.4%	.246	1.33	.288	67.3%			4.21
2025	ATC	PROJ	7.15	3.00	2.38	0.98	18.2%	7.6%	10.5%	.268	1.40	.312	67.8%			4.19
2025	OOPSY	PROJ	7.93	3.35	2.37	0.90	20.1%	8.5%	11.6%	.242	1.33	.289	72.6%			3.96
2025	KCR	AAA	7.30	0.73	10.00	0.73	18.9%	1.9%	17.0%	.346	1.54	.415	79.5%	61	66	3.18
2025	SDP	AAA	7.00	1.67	4.20	1.33	16.8%	4.0%	12.8%	.322	1.59	.366	66.0%	101	90	5.12
2025	---	MiLB	7.09	1.37	5.17	1.14	17.4%	3.4%	14.0%	.329	1.58	.381	70.2%	88	82	4.51
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	4.25
2025			8.38	3.23	2.60	1.16	21.9%	8.4%	13.5%	.243	1.29	.289	72.5%			4.22
2025	FGDC	ROS	6.79	2.90	2.34	0.91	17.5%	7.5%	10.0%	.266	1.36	.307	68.7%			4.12
2025	Steamer	ROS	6.65	2.69	2.47	0.91	17.1%	6.9%	10.2%	.272	1.37	.312	70.8%			4.02
2025	ZiPS	ROS	6.94	3.12	2.23	0.91	17.8%	8.0%	9.8%	.260	1.35	.301	66.6%			4.21
2025	ZiPS DC	ROS	6.94	3.12	2.23	0.91	17.8%	8.0%	9.8%	.260	1.35	.301	66.6%			4.21
2025	ATC DC	ROS	6.79	2.97	2.29	0.87	17.3%	7.6%	9.7%	.267	1.39	.308	68.5%			4.04
2025	THE BAT	ROS	6.94	3.09	2.24	0.92	17.7%	7.9%	9.8%	.266	1.39	.308	67.9%			4.13
2025	OOPSY	ROS	6.67	2.78	2.39	0.97	17.1%	7.2%	10.0%	.273	1.39	.313	68.0%			4.09
Total	- - -	MLB	6.77	2.71	2.50	0.85	17.4%	6.9%	10.4%	.275	1.39	.319	68.4%	113	99	4.00

Preseason 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			57	34.5%	4.23
2024	SDP	MLB	157	88.1	113.5	3.6	6	3.8%	64	40.8%	5.21	4.46
2025	KCR	AAA	42	89.7	107.7	5.2			18	42.9%	2.92
2025	SDP	AAA	97	88.8	109.1	3.9			43	44.3%	6.00
2025	SDP	MLB	247	91.4	111.9	8.1	14	5.7%	119	48.2%	4.18	4.34
Total	- - -	MLB	404	90.1	113.5	6.4	20	5.0%	183	45.3%	4.56

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			57	34.5%	4.23
2024	SDP	MLB	157	88.1	113.5	3.6	6	3.8%	64	40.8%	5.21	4.46
2025	KCR	AAA	42	89.7	107.7	5.2			18	42.9%	2.92
2025	SDP	AAA	97	88.8	109.1	3.9			43	44.3%	6.00
2025	SDP	MLB	247	91.4	111.9	8.1	14	5.7%	119	48.2%	4.18	4.34
Total	- - -	MLB	404	90.1	113.5	6.4	20	5.0%	183	45.3%	4.56

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