Oakland Athletics vs Seattle Mariners Preview
Today's Starting Matchup
Today's starting pitching matchup features Oakland Athletics's Jack Perkins (3-10, 6.42 ERA) against Seattle Mariners's Kade Anderson (0-0, 4.50 ERA).
Seattle Mariners's Kade Anderson posts an league-average 4.50 ERA this season, while Jack Perkins has been struggling at 6.42. There is a clear gap in starting pitching quality.
Advanced metrics: Jack Perkins — FIP 4.87, K% 25.2%, 95.3 IP / Kade Anderson — FIP 5.60, K% 19.5%, 10.0 IP
Team Season Comparison
2026 season record: Oakland Athletics 54-86 (.386), Seattle Mariners 66-74 (.471).
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 -194, Seattle Mariners -65. Both clubs are evenly matched in run production.
Recent form: Oakland Athletics on a 1-game win streak, Seattle Mariners on a 2-game win 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 7.31 ERA, 19K in 28.1IP, Elvis Alvarado (Closer) 4.00 ERA, 54K in 45.0IP.
Seattle Mariners bullpen: 14 relievers on the active roster. Key arms: Andrés Muñoz (Closer) 4.29 ERA, 81K in 50.1IP, Bryan Woo 4.25 ERA, 149K in 148.1IP, Bryce Miller 4.01 ERA, 95K in 98.2IP.
Win Probability
Projected win probability: Oakland Athletics 38% vs Seattle Mariners 62%
Factors: Seattle Mariners's starter owns the lower ERA, Seattle Mariners's home-field advantage. Of course, baseball's inherent randomness means actual results may differ.
Key Tactical Points
Workload comparison: Jack Perkins averages 7.9 IP per start vs. Kade Anderson at 5.0 IP. Getting six-plus innings from the starter significantly eases the bullpen burden.
Jack Perkins has allowed 18 HR this season — a concern against a lineup with extra-base power.