The Boston Red Sox (56-49) and the Seattle Mariners (54-51) open a 3-game series Monday at T-Mobile Park. First pitch is scheduled for 9:40 p.m. ET. Let’s analyze BetMGM Sportsbook’s lines around the Red Sox vs. Mariners odds and make our expert MLB picks and predictions for the best bets.
Season series: Red Sox lead 2-1
The Red Sox dropped 2 of 3 games in an interleague set at the San Francisco Giants over the weekend. Boston has won 7 of the past 11 games on the road and is 5-2 in the past 7 games overall. The Red Sox have cashed the Under in 6 straight contests.
The Mariners posted a 4-0 win Sunday at the Arizona Diamondbacks, taking 2 of 3 games over the weekend to wrap up a 6-game road trip with a 4-2. The Under is 3-0 in the past 3 outings, and 5-2 across the past 7 games overall.
Boston posted 2 wins in 3 games in a set at Fenway Park from May 15-17, outscoring Seattle 22-17 as the Over cashed in all 3 outings.
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Red Sox at Mariners projected starters
RHP Nick Pivetta vs. RHP George Kirby
Pivetta (7-5, 4.11 ERA) makes his 9th start and 26th appearance. He has a 1.17 WHIP, 3.8 BB/9 and 11.1 K/9 through 81 IP.
- Last start: Win, 5 IP, 0 ER, 3 H, 1 BB, 5 K in a 7-1 home win vs. the Atlanta Braves last Tuesday
- 2023 road splits: 2-1, 3.60 ERA (35 IP, 14 ER – 4 HR), .205 opponent batting average (OBA) in 3 starts and 8 relief appearances
Kirby (9-8, 3.49 ERA) makes his 21st start. He has a 1.08 WHIP, 0.9 BB/9 and 8.2 K/9 through 123 2/3 IP.
- Last start: No-decision, 4 IP, 5 ER, 7 H, 1 BB, 9 K in a 9-7 road win vs. Minnesota Twins Tuesday
- 2023 home splits: 6-3, 3.38 ERA (61 1/3 IP, 23 ER – 8 HR), .228 OBA in 10 starts
Red Sox at Mariners odds
Provided by BetMGM Sportsbook; access USA TODAY Sports Scores and Sports Betting Odds hub for a full list. Lines last updated at 8:30 a.m. ET.
- Moneyline (ML): Red Sox +115 (bet $100 to win $115) | Mariners -140 (bet $140 to win $100)
- Run line (RL)/Against the spread (ATS): Red Sox +1.5 (-185) | Mariners -1.5 (+150)
- Over/Under (O/U): 8 (O: -105 | U: -115)
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Red Sox at Mariners picks and predictions
Prediction
Mariners 4, Red Sox 3
Moneyline
The MARINERS (-140) are a strong play at home in the series opener behind the All-Star Kirby.
Kirby has had some issues since the All-Star break, coughing up 11 earned across 16 IP in his past 3 outings. However, this is the same pitcher who allowed just a single run while scattering 8 hits and a walk with 6 K across 6 2/3 IP in a 10-1 win at Fenway Park against the Red Sox back on May 15. Trust Kirby to get right in the series opener.
Run line/Against the spread
The Red Sox +1.5 (-185) will cost you nearly 2 times your potential return if you require a little insurance, and you just cannot pick Boston straight up. That’s too expensive. If you like Boston, which I don’t, just pick it outright.
PASS.
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Over/Under
UNDER 8 (-115) is the lean ever so slightly.
The total has gone low in each of the past 6 games for the Red Sox while cashing in 4 of the past 5 games on the road.
The Under has hit in 3 in a row for the Diamondbacks while going 5-2 across the past 7 games overall for Arizona.
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For more sports betting picks and tips, check out SportsbookWire.com and BetFTW.
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