Seattle Mariners at Boston Red Sox odds, picks and predictions

The Seattle Mariners (57-52) take on the Boston Red Sox (56-50) Wednesday in the finale of a 3-game set at Fenway Park at 4:10 p.m. ET (MLB Network). Let’s analyze BetMGM Sportsbook’s lines around the Mariners vs. Red Sox odds and make our expert MLB picks and predictions for the best bets.

Season series: Tied 3-3

The M’s dropkicked the Sox with 8 runs in the 5th and 6th innings to take control of a 10-6 win Tuesday. SS Dylan Moore continued his hot hitting with 2 hits and 3 RBIs. He has hits in 5 straight games. The Mariners have won 4 of 5 as they continue their march toward October.

The Red Sox have lost 3 of 4 and are just 3-7 over the last 10 games. After leading the league in ERA for a good chunk of the season, their pitching has really eroded. They’ve allowed 63 runs in the last 6 games! Red Sox 3B Rafael Devers did his part Tuesday with a 3-for-5 night with a homer and 4 RBIs.

Mariners at Red Sox projected starters

RHP George Kirby vs. RHP Brayan Bello

Kirby (8-7, 3.03 ERA) makes his 23rd start. He has a 0.98 WHIP, 1.0 BB/9 and 8.9 K/9 through 130 2/3 innings.

• Last start: Win, 7 IP, 0 ER, 6 H, 1 BB, 7 K in 10-0 victory Friday at Chicago White Sox
• Last 5 starts vs. Boston: 2-1, 3.18 ERA, 1.24 WHIP, 28 K in 28 1/3 IP

Bello (10-5, 5.27 ERA) makes his 20th start. He has a 1.44 WHIP, 3.2 BB/9 and 8.6 K/9 through 100 2/3 innings.

• Last start: No-decision, 5 IP, 3 ER, 5 H, 2 BB, 4 K in 9-7 home win Friday against New York Yankees
• 3 career starts vs. Mariners: 3-0, 3.94 ERA, 1.44 WHIP, 16 K in 16 IP

Who’s going yard? Here’s a breakdown of today’s best home run props with our top picks. Include the BetMGM bonus code SBWIRE to score a $1,500 first-bet offer.

Mariners at Red Sox odds

Provided by BetMGM Sportsbook; access USA TODAY Sports Scores and Sports Betting Odds hub for a full list. Lines last updated at 12:45 p.m. ET.

• Moneyline (ML): Mariners -120 (bet $120 to win $100) | Red Sox +100 (bet $100 to win $100)
• Run line (RL)/Against the spread (ATS): Mariners -1.5 (+135) | Red Sox +1.5 (-160)
• Over/Under (O/U): 9.5 (O: -105 | U: -115)

Mariners at Red Sox picks and predictions

Prediction

Mariners 5, Red Sox 3

Kirby has allowed 1 ER or fewer in 3 straight starts, and Bello has allowed 3+ ER in 4 straight. I really like the MARINERS -125 here for the price. They’ve scored 6+ runs in 5 straight games and have reinforcements in place from the trade deadline.

I like GEORGE KIRBY OVER 5.5 K’S (-110). He has 6+ K’s in 4 straight starts overall and in his last 3 against the Red Sox.

I know we’ve gone WAY Over in the first 2 games of the series, but we’re going Under Wednesday. It’s slated to be 80 degrees with a fierce 13-mph wind blowing straight in. It’s get-away day, and make sure your destination is to the bank with UNDER 9.5 (-115).

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