Seth Lonsway

#86 P · B/T: L/L · 6' 0", 206 lb · Age 27 · St. Mary's, OH, USA · MLB debut 2026 · Draft: 2021 Rd 19 #557 (CIN) — Celina (OH) HS · San Francisco Giants

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Career Graph

Pitching

Season	Team	W	L	SV	BS	G	GS	QS	IP	IP/G	SO	K/9	BB/9	ERA	FIP	WAR
2026	SF	0	0	0	0	2	0	0	2.1	1.2	2	7.7	0.0	7.71	1.39	0.1
Career		0	0	0	0	2	0	0	2.1	1.2	2	7.7	0.0	7.71	—	0.1

Season	Team	W	L	SV	BS	G	GS	QS	IP	IP/G	SO	K/9	BB/9	ERA
Triple-A (AAA)
2025	SAC	2	4	0	0	9	9	3	42.0	4.7	38	8.1	5.4	4.29
2026	SAC	2	5	1	0	24	20	—	91.2	3.8	59	5.8	5.7	5.11
AAA Total		4	9	1	0	33	29	3	133.2	4.1	97	6.5	5.6	4.85
Double-A (AA)
2024	RIC	2	1	0	0	6	5	—	32.2	5.4	26	7.2	1.9	1.38
2025	RIC	3	8	0	0	19	19	2	92.0	4.8	84	8.2	4.1	3.52
2026	RIC	0	0	0	1	1	0	—	3.2	3.7	2	4.9	2.5	4.91
AA Total		5	9	0	1	26	24	2	128.1	4.9	112	7.9	3.5	3.02
High-A (A+)
2023	EUG	2	9	2	0	28	17	—	89.0	3.2	78	7.9	5.9	5.87
2024	EUG	2	3	0	0	13	12	—	63.0	4.8	57	8.1	2.9	3.86
A+ Total		4	12	2	0	41	29	—	152.0	3.7	135	8.0	4.6	5.03
Single-A (A)
2022	SJ	9	3	1	0	26	9	—	95.1	3.7	120	11.3	4.8	4.06
A Total		9	3	1	0	26	9	—	95.1	3.7	120	11.3	4.8	4.06
Rookie (Rk)
2021	A-GIO	0	0	0	0	4	4	—	5.0	1.3	10	18.0	0.0	7.20
Rk Total		0	0	0	0	4	4	—	5.0	1.3	10	18.0	0.0	7.20
Minors Total		22	33	4	1	130	95	5	514.1	4.0	474	8.3	4.6	4.32

Fielding

Season	Team	Pos	G	Inn	PO	A	E	FPCT
2026	SF	P	2	2.1	0	0	0	.000
Career		P	2	2.1	0	0	0	—

Season	Team	Pos	G	Inn	PO	A	E	FPCT
Triple-A (AAA)
2025	SAC	P	9	42.0	0	5	1	.833
2026	SAC	P	24	91.2	1	13	1	.933
AAA Total		—	33	133.2	1	18	2	.905
Double-A (AA)
2024	RIC	P	6	32.2	3	4	1	.875
2025	RIC	P	19	92.0	4	19	3	.885
2026	RIC	P	1	3.2	0	2	0	1.000
AA Total		—	26	128.1	7	25	4	.889
High-A (A+)
2023	EUG	P	28	89.0	1	13	4	.778
2024	EUG	P	13	63.0	3	6	1	.900
A+ Total		—	41	152.0	4	19	5	.821
Single-A (A)
2022	SJ	P	26	95.1	1	23	3	.889
A Total		—	26	95.1	1	23	3	.889
Rookie (Rk)
2021	A-GIO	P	4	5.0	1	0	1	.500
Rk Total		—	4	5.0	1	0	1	.500
Minors Total		—	130	514.1	14	85	15	.868