Boston Red Sox at Seattle Mariners odds, picks and predictions

Analyzing Monday’s Boston Red Sox at Seattle Mariners odds and lines, with MLB expert picks, predictions and best bets.

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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