Today's starting pitching matchup features Seattle Mariners's Bryce Miller (3-2, 1.97 ERA) against Pittsburgh Pirates's Bubba Chandler (3-7, 4.42 ERA).

Seattle Mariners's Bryce Miller posts an elite 1.97 ERA this season, while Bubba Chandler has been league-average at 4.42. There is a clear gap in starting pitching quality.

Advanced metrics: Bryce Miller — FIP 3.06, K% 33.1%, 45.7 IP / Bubba Chandler — FIP 4.63, K% 20.9%, 79.3 IP

2026 season record: Seattle Mariners 42-43 (.494), Pittsburgh Pirates 42-42 (.500).

Recent form: Seattle Mariners on a 2-game losing streak, Pittsburgh Pirates on a 1-game win streak.

Based on starting pitching, Seattle Mariners holds the edge.

Seattle Mariners bullpen: 13 relievers on the active roster. Key arms: Andrés Muñoz (Closer) 4.91 ERA, 46K in 29.1IP, Bryan Woo 4.26 ERA, 92K in 93.0IP, Bryce Miller 1.97 ERA, 54K in 45.2IP.

Pittsburgh Pirates bullpen: 13 relievers on the active roster. Key arms: Brandan Bidois 5.14 ERA, 17K in 14.0IP, Braxton Ashcraft 3.07 ERA, 107K in 96.2IP, Bubba Chandler 4.42 ERA, 73K in 79.1IP.

Projected win probability: Seattle Mariners 57% vs Pittsburgh Pirates 43%

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

Workload comparison: Bryce Miller averages 6.5 IP per start vs. Bubba Chandler at 5.3 IP. Getting six-plus innings from the starter significantly eases the bullpen burden.