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The Cleveland Guardians (3-1) and Seattle Mariners (2-2) open a 3-game series Monday at T-Mobile Park in Seattle. First pitch is scheduled for 9:40 p.m. ET. Let’s analyze BetMGM Sportsbook’s lines around the Guardians vs. Mariners odds and make our expert MLB picks and predictions for the best bets.
Season series: First meeting; Guardians won 4-3 last season
The Guardians opened the season by taking 3 straight in Oakland against the Athletics, including an 8-0 shutout on Opening Day. While the A’s walked it off in the bottom of the 9th on Sunday 4-3 to salvage 1 of the 4 games, Cleveland outscored Oakland 29-11 in the series, cashing the Over 3 times.
The Mariners split a 4-game set with the visiting Boston Red Sox. After falling 6-4 in the opener Thursday, Seattle scored a pair of low-scoring, 1-run wins Friday (1-0) and Saturday (4-3). The Red Sox won 5-1 in the series final on Sunday. The Under has cashed in 3 straight for Seattle.
Cleveland won 3 of 4 games in Seattle last season, with the Over and Under splitting 2-2. The underdog has cashed in 6 straight meetings in this series.
Guardians at Mariners projected starters
RHP Triston McKenzie vs. RHP Emerson Hancock
McKenzie (0-3, 5.06 ERA) made 4 starts in 2023. He posted a 1.56 WHIP, 7.3 BB/9 and 9.0 K/9 in 16 IP.
- 2023 road splits: 0-1, 0.96 ERA (9 1/3 IP, 1 ER), 4 H, 4 BB, 11 K in 2 starts
- Last start vs. Mariners: Loss, 6 IP, 3 ER, 3 H (1 HR), 2 BB, 4 K in a 3-1 loss in Seattle on Aug. 25, 2022
Hancock (0-0, 4.50 ERA) made his 1st 3 major league starts in 2023. He posted a 1.33 WHIP, 2.3 BB/9 and 4.5 K/9 in 12 innings.
- 2023 home splits: ND, 5 IP, 1 ER, 2 H, 3 BB, 3 K in 6-1 home win vs. San Diego Padres in only career home start Aug. 9, 2023
- First career appearance vs. Guardians
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Guardians 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 6:19 a.m. ET.
- Moneyline (ML): Guardians -115 (bet $115 to win $100) | Mariners -105 (bet $105 to win $100)
- Run line (RL)/Against the spread (ATS): Guardians -1.5 (+150) | Mariners +1.5 (-185)
- Over/Under (O/U): 8 (O: -105 | U: -115)
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Guardians at Mariners picks and predictions
Prediction
Guardians 4, Mariners 3
Moneyline
The GUARDIANS (-115) is worth playing lightly in this series opener in Seattle. McKenzie was banged up last season, missing all but 4 starts due to an elbow injury and a shoulder ailment. All indications are he is back to 100 percent health, and he had a strong Cactus League finale with 7 strikeouts.
The Mariners (-105) counter with Hancock, who had no decisions in his first 3 major league starts.
Run line/Against the spread
The Mariners +1.5 (-185) will cost you nearly 2 times your potential return, and that’s too much risk for not enough reward if you need a little insurance.
AVOID, and play Seattle straight up if you like it.
Over/Under
UNDER 8 (-115) is worth a look in this series opener.
While Cleveland hit the Over in 3 of the first 4 games, it was facing an awful Oakland side. We should see much better pitching from both sides, and lower scores.
Seattle cashed the Under in each of the final 3 games of the Boston series, and the offense is averaging just 2.5 runs per game through 4 outings, while allowing just 2.7 RPG in the past 3 contests.
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