Seth Lonsway

San Francisco Giants

RP · #86 · Bats L · Throws L · 6'0" · 206 lb · Age 27 · 1 yr in MLB

2026 grade

29.8

Runs prevented: +0.2
IP · ERA: 2.1 · 7.71
K · BB: 2 · 0
Rank: Not qualified

What the grade is made of

Runs each part saves or costs against an average pitcher facing the same batters. Contact counts a quarter for how it turned out, because over a season that's mostly the fielders and luck.

Home runs allowed0 vs 0 avg+0.6
Contact allowed (how it turned out counts a quarter)12 vs 9 avg−0.5
Walks0 vs 1 avg+0.4
Strikeouts2 vs 3 avg−0.3
Parks pitched in−0.1
Hit batters0 vs 0 avg+0.1

2026 game log: pitching

Game grades need 3 batters faced; starts are ranked against starts, relief outings against relief outings.

Game	Result	Dec	IP	H	R	ER	BB	K	HR	PC	Grade
Sun, Sep 27vsLAD	L 1-5	H	0.1	2	0	0	0	0	0	7	19.4
Sat, Aug 29vsARI	L 1-7		2.0	5	3	2	0	2	0	33	16.5

Scores, box scores and play-by-play from ESPN. The run values and park factors behind the grades were worked out from Retrosheet's play-by-play: the information used here was obtained free of charge from and is copyrighted by Retrosheet. Interested parties may contact Retrosheet at www.retrosheet.org.