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The Boston Red Sox (1-2) and Seattle Mariners (2-1) meet Sunday for the finale of a 4-game series. First pitch from T-Mobile Park is set for 4:10 p.m. ET. Let’s analyze FanDuel Sportsbook’s lines around the Red Sox vs. Mariners odds and make our expert MLB picks and predictions for the best bets.
Season series: Seattle leads 2-1
Seattle picked up the 4-3 win in 10 innings over Boston Saturday while covering as a -148 home favorite. Sunday’s game was tied at 1 up until the 10th inning, when Boston broke the tie and scored 2 runs. The Mariners answered, scoring 3 runs of their own to pick up their 2nd consecutive win vs. Boston.
Reliever Joely Rodriguez was credited with the loss for Boston, as he let up 2 hits and 2 earned runs with 0 Ks in only 1/3 IP. RHP Logan Gilbert pitched 7 innings for Seattle, picking up 8 Ks while allowing 4 hits and only 1 earned run.
Red Sox at Mariners projected starters
RHP Garrett Whitlock vs. RHP Bryce Miller
Whitlock (5-5, 5.15 ERA) made 10 starts and 12 relief appearances in 2023. He had a 1.33 WHIP, 1.6 BB/9 and 9.0 K/9 in 71 2/3 innings.
- 2023 road splits: 2-4, 5.89 ERA (36 2/3 IP, 24 ER), 45 H, 34 K in 6 starts and 6 relief appearances
- Career vs. Mariners: 0-0, 8.44 ERA (5 1/3 IP, 5 ER), 12 H, 6 K in 1 start and 1 relief appearance
Miller (8-7, 4.32 ERA) made 25 starts in his rookie campaign in 2023. He had a 1.14 WHIP, 1.8 BB/9 and 8.2 K/9 in 131 1/3 innings.
- 2023 home splits: 5-3, 3.65 ERA (74 IP, 30 ER), 64 H, 66 K in 14 starts
- Career vs. Boston: Loss, 5 2/3 IP, 6 ER, 7 H, 2 BB, 4 K in 1 start, a 6-4 home loss Aug. 1, 2023
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Red Sox at Mariners odds
Provided by FanDuel Sportsbook; access USA TODAY Sports Scores and Sports Betting Odds hub for a full list. Lines last updated at 9:10 a.m. ET.
- Moneyline (ML): Red Sox +128 (bet $100 to win $128) | Mariners -152 (bet $152 to win $100)
- Run line (RL)/Against the spread (ATS): Red Sox +1.5 (-160) | Mariners -1.5 (+132)
- Over/Under (O/U): 7.5 (O: -118 | U: -104)
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Red Sox at Mariners picks and predictions
Prediction
Mariners 3, Red Sox 1
Moneyline
BET MARINERS (-152).
Seattle has won each of its last 2 matchups vs. Boston and is 3-1 in its last 4 matchups vs. the Red Sox in Seattle. I also trust Miller, as his stats were very solid last season and I expect him to be even better entering his sophomore year.
Whitlock struggled on the road last year and vs. Seattle in his career, so I expect that to continue here.
Run line/Against the spread
PASS.
I actually like the Mariners to cover here as -1.5 (+132) favorites, but I believe their odds make more sense on the moneyline, as that is the safer bet. Each of the last 2 meetings between these squads has come down to a 1-run finish, and I don’t expect that continue here, but I am also not a fan of doubling down on the run line and moneyline for 1 team.
If you are willing to take the risk of doubling up, then this is not a bad bet.
Over/Under
BET UNDER 7.5 (-104).
The Under has hit 7 of Boston’s last 8 games dating back to last season. For Seattle, the Under has hit in 4 of its last 5 games and is 6-2-2 in its last 10 dating back to last year. The Under has also hit in back-to-back meetings between these squads.
Be aware that the Over has hit in 7 of the last 10 Seattle-Boston matchups.
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