Boston Red Sox vs Seattle Mariners Preview
Today's Starting Matchup
Today's starting pitching matchup features Boston Red Sox's Ranger Suarez (2-3, 3.21 ERA) against Seattle Mariners's Bryce Miller (3-0, 1.54 ERA).
Seattle Mariners's Bryce Miller posts an elite 1.54 ERA this season, while Ranger Suarez has been solid at 3.21. There is a clear gap in starting pitching quality.
Advanced metrics: Ranger Suarez — FIP 2.83, K% 24.5%, 70.0 IP / Bryce Miller — FIP 2.96, K% 28.8%, 35.0 IP
Team Season Comparison
2026 season record: Boston Red Sox 29-43 (.403), Seattle Mariners 39-37 (.513).
Seattle Mariners holds the edge in the season standings, though Boston Red Sox can't be counted out based on head-to-head matchups.
Recent form: Boston Red Sox on a 4-game losing streak, Seattle Mariners on a 1-game win streak.
Based on starting pitching, Seattle Mariners holds the edge.
Bullpen Analysis
Boston Red Sox bullpen: 13 relievers on the active roster. Key arms: Aroldis Chapman (Closer) 0.83 ERA, 29K in 21.2IP, Connelly Early 3.81 ERA, 72K in 75.2IP, Danny Coulombe (Setup) 5.28 ERA, 10K in 15.1IP.
Seattle Mariners bullpen: 13 relievers on the active roster. Key arms: Alex Hoppe 5.57 ERA, 23K in 21.0IP, Andrés Muñoz (Closer) 5.47 ERA, 39K in 26.1IP, Bryan Woo 3.94 ERA, 88K in 89.0IP.