Today's starting pitching matchup features Seattle Mariners's Emerson Hancock (3-2, 3.07 ERA) against Oakland Athletics's Luis Severino (2-5, 4.23 ERA).

Seattle Mariners's Emerson Hancock posts an solid 3.07 ERA this season, while Luis Severino has been league-average at 4.23. There is a clear gap in starting pitching quality.

Advanced metrics: Emerson Hancock — FIP 3.59, K% 26.2%, 58.7 IP / Luis Severino — FIP 4.32, K% 24.2%, 61.7 IP

2026 season record: Seattle Mariners 26-29 (.473), Oakland Athletics 27-27 (.500).

Recent form: Seattle Mariners on a 1-game win streak, Oakland Athletics on a 1-game losing streak.

Based on starting pitching, Seattle Mariners holds the edge.

Seattle Mariners bullpen: 13 relievers on the active roster. Key arms: Alex Hoppe 6.35 ERA, 12K in 11.1IP, Andrés Muñoz (Closer) 4.58 ERA, 32K in 19.2IP, Bryan Woo 3.82 ERA, 59K in 63.2IP.

Oakland Athletics bullpen: 13 relievers on the active roster. Key arms: Aaron Civale 4.20 ERA, 39K in 55.2IP, Hogan Harris (Setup) 2.96 ERA, 27K in 24.1IP, J.T. Ginn 3.19 ERA, 48K in 53.2IP.

Projected win probability: Seattle Mariners 53% vs Oakland Athletics 47%

Factors: Seattle Mariners's starter owns the lower ERA, Oakland Athletics's home-field advantage. Of course, baseball's inherent randomness means actual results may differ.

Workload comparison: Emerson Hancock averages 5.9 IP per start vs. Luis Severino at 5.6 IP. Getting six-plus innings from the starter significantly eases the bullpen burden.