Oakland Athletics vs Seattle Mariners Preview
Today's Starting Matchup
Today's starting pitching matchup features Oakland Athletics's Jeffrey Springs (3-13, 6.37 ERA) against Seattle Mariners's George Kirby (9-10, 4.19 ERA).
Seattle Mariners's George Kirby posts an league-average 4.19 ERA this season, while Jeffrey Springs has been struggling at 6.37. There is a clear gap in starting pitching quality.
Advanced metrics: Jeffrey Springs — FIP 6.29, K% 17.9%, 123.0 IP / George Kirby — FIP 3.81, K% 20.0%, 152.7 IP
Team Season Comparison
2026 season record: Oakland Athletics 55-86 (.390), Seattle Mariners 66-75 (.468).
Seattle Mariners holds the edge in the season standings, though Oakland Athletics can't be counted out based on head-to-head matchups.
Run differential: Oakland Athletics -191, Seattle Mariners -68. Both clubs are evenly matched in run production.
Recent form: Oakland Athletics on a 2-game win streak, Seattle Mariners on a 1-game losing streak.
Based on starting pitching, Seattle Mariners holds the edge.
Bullpen Analysis
Oakland Athletics bullpen: 14 relievers on the active roster. Key arms: Brady Basso 4.75 ERA, 24K in 30.1IP, Chris Roycroft 7.20 ERA, 21K in 30.0IP, Elvis Alvarado (Closer) 4.00 ERA, 54K in 45.0IP.