Red Sox vs Mariners Picks and Prediction – 6/17/2025

The Boston Red Sox open a three-game series on the road Monday in the Pacific Northwest versus the Seattle Mariners. Boston improved to 36-36 following Saturday’s 4-3 victory over the New York Yankees. Boston has won four straight and six of the last seven. The Red Sox trail first-place New York by 7 ½ games in the American League East. Keep up to date with all the MLB action with our expert MLB picks.

Rafael Devers is batting .271 with 14 home runs, 57 RBI, and an on-base percentage of .400 to lead Boston in the four categories. Jarren Duran is the leader in hits with 81. Boston is batting .254 with a .423 slugging percentage. On Monday, Boston will send Lucas Giolito to the mound. The right-hander is 2-1 with a 5.45 ERA, 31 Ks, and 14 BBs.

The Seattle Mariners improved to 35-34 following Saturday's 4-3 victory over the Cleveland Guardians. Jorge Polanco’s RBI single in the bottom of the ninth gave Seattle a walk-off victory over the Guardians. Seattle has won two straight since snapping a three-game losing skid. The Mariners trail first-place Houston by 4 ½ games in the American League West.

J.P. Crawford is batting .295 to lead Seattle and has a team-high .410 on-base percentage, while Julio Rodriguez is the leader in hits with 74. Cal Raleigh is the leader in home runs with 26 and in RBI with 54. Seattle is batting .244 with a .399 slugging percentage. Seattle has not announced its starting pitcher for the opening game of the three-game series on Monday versus Boston.

The Boston Red Sox will pick up a victory on the road Monday when visiting the Seattle Mariners to open a three-game series, but the play here is UNDER. The UNDER has cashed in four of Seattle's last six played at home, four of Boston's last five overall, and in four of the last six the Red Sox have played on the road in the opening game of a series. Boston starter Lucas Giolito is coming off a strong outing in which the right-hander allowed no runs on three hits across six innings. Final Score Prediction: Boston Red Sox win but our best play is UNDER 4-2.