Pitching

Jackson Steensma

Seattle Mariners (A)

Age: 22

Bats/Throws: S/R

6'4" / 244

DOB: 3/12/2004

(22 years, 7 months, 21 days)

Player Dashboard:

Season	2026
Team	SEA
Level	MiLB
G	15
GS	12
IP	43.1
K%	34.9%
BB%	5.7%
GB%	45.0%
ERA	4.57
FIP	4.83
WAR

RosterResource

How Acquired:	Draft
Draft:	2025, Rd: 9, Pick: 17, Ovr: 272
Draft Team:	Seattle Mariners
Signing Bonus:	$201,300
College:	Appalachian State (Boone, USA)

Dec'28

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Injury Report

Season	2026
Team	SEA
Level	MiLB
G	15
GS	12
IP	43.1
K%	34.9%
BB%	5.7%
GB%	45.0%
ERA	4.57
FIP	4.83
WAR

RosterResource

How Acquired:	Draft
Draft:	2025, Rd: 9, Pick: 17, Ovr: 272
Draft Team:	Seattle Mariners
Signing Bonus:	$201,300
College:	Appalachian State (Boone, USA)

Dec'28

Article Source

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Rotowire News

Injury Report

Stats

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Preseason ProjectionsMinor LeaguesCollege

Season	Team	Level	Age	W	L	SV	G	GS	IP	K/9	BB/9	HR/9	BABIP	LOB%	GB%	HR/FB	ERA	FIP	xFIP	WAR
2023	APP	NCAA	19	3	1	7	22	0	27.1	11.20	5.60	0.66	.328	71.1%			4.28	4.95
2024	APP	NCAA	20	6	2	0	14	14	67.0	9.94	2.82	1.75	.280	80.8%			4.03	5.37
2026	SEA	A	22	0	6	0	15	12	43.1	12.67	2.08	1.66	.298	67.9%	45.0%	22.2%	4.57	4.83	3.79
2027	Steamer	PROJ	23	0	0	0	0	0	1.0	6.29	4.53	1.41	.289	70.5%	40.8%		5.17	5.38	5.26	0.0

Season	Team	Level	Age	W	L	SV	G	GS	IP	K/9	BB/9	HR/9	BABIP	LOB%	GB%	HR/FB	ERA	FIP	xFIP	WAR
2023	APP	NCAA	19	3	1	7	22	0	27.1	11.20	5.60	0.66	.328	71.1%			4.28	4.95
2024	APP	NCAA	20	6	2	0	14	14	67.0	9.94	2.82	1.75	.280	80.8%			4.03	5.37
2026	SEA	A	22	0	6	0	15	12	43.1	12.67	2.08	1.66	.298	67.9%	45.0%	22.2%	4.57	4.83	3.79
2027	Steamer	PROJ	23	0	0	0	0	0	1.0	6.29	4.53	1.41	.289	70.5%	40.8%		5.17	5.38	5.26	0.0

Preseason ProjectionsMinor LeaguesCollege

Season	Team	Level	W	L	ERA	G	GS	QS	SV	HLD	BS	IP	TBF	H	R	ER	HR	BB	IBB	HBP	WP	BK	SO
2023	APP	NCAA	3	1	4.28	22	0		7			27.1	124	24	15	13	2	17		4	5	0	34
2024	APP	NCAA	6	2	4.03	14	14		0			67.0	280	60	31	30	13	21		4	1	0	74
2026	SEA	A	0	6	4.57	15	12		0	0	0	43.1	175	36	23	22	8	10	0	2	1	2	61
2027	Steamer	PROJ	0	0	5.17	0	0	0	0	0		1.0	5	1	1	1	0	1	0	0			1

Season	Team	Level	W	L	ERA	G	GS	QS	SV	HLD	BS	IP	TBF	H	R	ER	HR	BB	IBB	HBP	WP	BK	SO
2023	APP	NCAA	3	1	4.28	22	0		7			27.1	124	24	15	13	2	17		4	5	0	34
2024	APP	NCAA	6	2	4.03	14	14		0			67.0	280	60	31	30	13	21		4	1	0	74
2026	SEA	A	0	6	4.57	15	12		0	0	0	43.1	175	36	23	22	8	10	0	2	1	2	61
2027	Steamer	PROJ	0	0	5.17	0	0	0	0	0		1.0	5	1	1	1	0	1	0	0			1

Preseason ProjectionsMinor LeaguesAveragesCollege

Season	Team	Level	K/9	BB/9	K/BB	HR/9	K%	BB%	K-BB%	AVG	WHIP	BABIP	LOB%	ERA-	FIP-	FIP
2023	APP	NCAA	11.20	5.60	2.00	0.66	27.4%	13.7%	13.7%	.233	1.50	.328	71.1%	70	81	4.95
2024	APP	NCAA	9.94	2.82	3.52	1.75	26.4%	7.5%	18.9%	.235	1.21	.280	80.8%	70	94	5.37
2026	SEA	A	12.67	2.08	6.10	1.66	34.9%	5.7%	29.1%	.221	1.06	.298	67.9%	83	90	4.83
2027	Steamer	PROJ	6.29	4.53	1.39	1.41	15.5%	11.2%	4.3%	.266	1.56	.289	70.5%			5.38

Season	Team	Level	K/9	BB/9	K/BB	HR/9	K%	BB%	K-BB%	AVG	WHIP	BABIP	LOB%	ERA-	FIP-	FIP
2023	APP	NCAA	11.20	5.60	2.00	0.66	27.4%	13.7%	13.7%	.233	1.50	.328	71.1%	70	81	4.95
2024	APP	NCAA	9.94	2.82	3.52	1.75	26.4%	7.5%	18.9%	.235	1.21	.280	80.8%	70	94	5.37
2026	SEA	A	12.67	2.08	6.10	1.66	34.9%	5.7%	29.1%	.221	1.06	.298	67.9%	83	90	4.83
2027	Steamer	PROJ	6.29	4.53	1.39	1.41	15.5%	11.2%	4.3%	.266	1.56	.289	70.5%			5.38

Preseason ProjectionsMinor LeaguesCollege

Season	Team	Level	GB/FB	LD%	GB%	FB%	IFFB%	HR/FB	IFH%	BUH%	divider	Pull%	Cent%	Oppo%	divider	Soft%	Med%	Hard%	divider	SIERA	xFIP-	xFIP
2026	SEA	A	1.25	19.0%	45.0%	36.0%	30.6%	22.2%				51.0%	24.5%	24.5%							68	3.79
2027	Steamer	PROJ		20.4%	40.8%	38.7%																5.26

Season	Team	Level	GB/FB	LD%	GB%	FB%	IFFB%	HR/FB	IFH%	BUH%	divider	Pull%	Cent%	Oppo%	divider	Soft%	Med%	Hard%	divider	SIERA	xFIP-	xFIP
2026	SEA	A	1.25	19.0%	45.0%	36.0%	30.6%	22.2%				51.0%	24.5%	24.5%							68	3.79
2027	Steamer	PROJ		20.4%	40.8%	38.7%																5.26

Preseason ProjectionsMinor LeaguesCollege

Season	Team	Level	GB	FB	LD	IFFB	IFH	BU	BUH	RS	Balls	Strikes	Pitches	divider	EV	LA	Barrels	Barrel%
2026	SEA	A	45	36	19	11					236	457	693
2027	Steamer	PROJ	1	1	1

Season	Team	Level	GB	FB	LD	IFFB	IFH	BU	BUH	RS	Balls	Strikes	Pitches	divider	EV	LA	Barrels	Barrel%
2026	SEA	A	45	36	19	11					236	457	693
2027	Steamer	PROJ	1	1	1

MLB F-Strike%, SwStr%, CStr%, CSW% are from the Sports Info Solution data source.
All MiLB and Pace data are from Statcast.

Preseason ProjectionsMinor LeaguesAveragesCollege

Season	Team	Level	O-Swing%	Z-Swing%	Swing%	divider	O-Contact%	Z-Contact%	Contact%	Zone%	divider	F-Strike%	SwStr%	CStr%	CSW%	divider	Pace
2026	SEA	A			52.8%				65.8%			60.0%	18.0%	12.8%	30.9%

Season	Team	Level	O-Swing%	Z-Swing%	Swing%	divider	O-Contact%	Z-Contact%	Contact%	Zone%	divider	F-Strike%	SwStr%	CStr%	CSW%	divider	Pace
2026	SEA	A			52.8%				65.8%			60.0%	18.0%	12.8%	30.9%

Preseason ProjectionsMinor LeaguesCollege

Season	Team	Level	Pos	G	GS	Inn	PO	A	divider	E	FE	TE	divider	DP	DPS	DPT	DPF	divider	Scp	divider	SB	CS	PB	WP	divider	FP	divider	TZ
2026	SEA	A	P	15	12	43.1	6	5		0				1

Season	Team	Level	Pos	G	GS	Inn	PO	A	divider	E	FE	TE	divider	DP	DPS	DPT	DPF	divider	Scp	divider	SB	CS	PB	WP	divider	FP	divider	TZ
2026	SEA	A	P	15	12	43.1	6	5		0				1

Jackson Steensma

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Plate Discipline - Statcast

Fielding

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