Seattle Mariners vs Boston Red Sox – MLB Preview – June 18, 2025

The Seattle Mariners and Boston Red Sox will play the rubber match of their three-game series Wednesday at T-Mobile Park. First pitch is scheduled for 4:10 PM ET. Boston took the opener 2-0, while Seattle answered with an 8-0 shutout in Game 2.
Boston comes in at 38-37, while Seattle is 37-35. These two teams have split their last 10 matchups, with both clubs trading wins this season. This will be the third time Garrett Crochet starts against Seattle in the last 12 months, while Luis Castillo faces Boston for the fifth time in his career.
Mariners Preview – Raleigh Leads the Power Surge
Seattle’s offense broke out on Tuesday night with Cal Raleigh hitting a grand slam and adding a two-run double. Raleigh now leads MLB with 27 home runs. The team put up eight runs on just eight hits, ending a short slump at the plate.
Starter Luis Castillo is 4-4 with a 3.29 ERA. He has not won in his last four starts but has allowed only eight earned runs in that stretch. Castillo went six innings and struck out seven in his most recent outing, showing strong command.
Seattle’s bullpen holds a season ERA of 3.50 and WHIP of 1.23. Andrés Muñoz has been dominant, allowing just four earned runs over 28.2 innings. The Mariners have covered the run line in 15 of their last 29 home games and tend to start strong at home with 17 wins in their last 32 first five innings moneyline bets.
Red Sox Preview – Crochet Tries to Shut It Down
Boston’s offense has cooled off despite winning six of its last seven. The Red Sox have not scored more than four runs in any of those games. The team is now without Rafael Devers and Alex Bregman, leaving players like Jarren Duran and Enmanuel Valdez to step up.
Garrett Crochet starts for Boston with a 6-4 record and a 2.24 ERA. He has averaged 6.2 innings per start over his last five outings and has 44 strikeouts in that span. Crochet gave up four earned runs to Seattle back on April 24 but still struck out nine in five innings.
Boston’s bullpen has held up well with a 3.66 ERA. Aroldis Chapman and Garrett Whitlock have been key, combining for 11.2 shutout innings over their last six combined appearances. The Red Sox have hit the 1st Five Run Line in 17 of their last 24 road games and have won 8 of their last 10 overall.
Betting Prediction
The total is set at 7.0 with Boston slightly favored at -125 on the moneyline. Crochet has been dominant lately, and the Red Sox bullpen is deeper and healthier than Seattle’s. Castillo is tough at home but hasn’t won in a month.
Both teams have shown they can win close games, but Boston has a recent edge. If Crochet continues his strong form, Boston should take this one by a score like 3-2 or 4-2. The under is the stronger play based on both pitchers’ recent outings and Boston’s low-scoring stretch.
Pick: Red Sox -125 / Under 7.0




