Red Sox vs Diamondbacks Prediction, Odds, Moneyline, Spread & Over/Under for Aug. 18

Odds updated as of 5:12 a.m.

The Boston Red Sox will take on the Arizona Diamondbacks in MLB action on Tuesday.

We've got you covered, in terms of the vital information about this game before you take a look at the MLB odds and spreads on FanDuel Sportsbook.

Red Sox vs Diamondbacks Game Info

• Boston Red Sox (67-58) vs. Arizona Diamondbacks (66-60)
• Date: Tuesday, August 18, 2026
• Time: 7:10 p.m. ET
• Venue: Fenway Park -- Boston, Massachusetts
• Coverage: NESN and Dbacks.TV

Red Sox vs Diamondbacks Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: BOS: (-174) | ARI: (+146)
• Spread: BOS: -1.5 (+120) | ARI: +1.5 (-144)
• Total: 8.5 -- Over: (-115) | Under: (-105)

Red Sox vs Diamondbacks Probable Starting Pitchers

Probable Pitchers: Ranger Suarez (Red Sox) - 4-3, 3.25 ERA vs Merrill Kelly (Diamondbacks) - 8-10, 5.11 ERA

This contest's pitching matchup is set, as the Red Sox will send Ranger Suarez (4-3) to the mound, while Merrill Kelly (8-10) will get the nod for the Diamondbacks. Suarez's team is 11-10-0 against the spread in his starts this season. Suarez's team is 8-7 this season when he starts and they are the moneyline favorite. When Kelly starts, the Diamondbacks have gone 12-10-0 against the spread. The Diamondbacks have a 5-8 record in Kelly's 13 starts this season when they were the underdog on the moneyline.

Red Sox vs Diamondbacks Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Red Sox win (66.2%)

Red Sox vs Diamondbacks Moneyline

• Arizona is a +146 underdog on the moneyline, while Boston is a -174 favorite at home.

Red Sox vs Diamondbacks Spread

• The Diamondbacks are +1.5 on the spread (-144 to cover), and Boston is +120 to cover the runline.

Red Sox vs Diamondbacks Over/Under

• A total of 8.5 runs has been set for the Red Sox-Diamondbacks contest on Aug. 18, with the over available at -115 and the under at -105.

Bet on Boston Red Sox vs. Arizona Diamondbacks on FanDuel today!

Red Sox vs Diamondbacks Betting Trends

• The Red Sox have come away with 44 wins in the 84 contests they have been listed as the favorites in this season.
• Boston has a record of 5-4 in contests when sportsbooks favor them by -174 or more on the moneyline.
• Contests with the Red Sox have gone over the total set by oddsmakers in 55 of 123 chances this season.
• The Red Sox are 60-63-0 against the spread in their 123 games with a line set by sportsbooks this season.
• The Diamondbacks have won 45.7% of the games this season they were the moneyline underdog (32-38).
• When it has played as a moneyline underdog with odds of +146 or longer, Arizona has gone 8-7 (53.3%).
• The Diamondbacks have had an over/under set by oddsmakers 125 times, and have combined with opponents to go over the total in 53 of those games (53-68-4).
• The Diamondbacks have collected a 67-58-0 record ATS this season (covering 53.6% of the time).

Red Sox Player Leaders

• Wilyer Abreu is hitting .259 with 27 doubles, three triples, 22 home runs and 56 walks. He has an on-base percentage of .337 while slugging .473.
• He ranks 67th in batting average, 64th in on-base percentage, and 32nd in slugging among qualifying hitters in the majors.
• Ceddanne Rafaela leads Boston in slugging percentage (.470) thanks to 51 extra-base hits. He's batting .288 with an on-base percentage of .325.
• Among all qualified, he is 16th in batting average, 83rd in on-base percentage and 37th in slugging percentage.
• Willson Contreras has 110 hits and an OBP of .391, both of which lead the Red Sox this season.
• Caleb Durbin has 12 home runs, 61 RBI and a batting average of .257 this season.
• Durbin brings a three-game hitting streak into this game. In his last five games he is hitting .421 with a home run, three walks and six RBIs.

Diamondbacks Player Leaders

• Corbin Carroll is leading the Diamondbacks with 113 hits. He's batting .247 and slugging .488 with an on-base percentage of .344.
• Including all qualified hitters, he ranks 87th in batting average, while his on-base percentage ranks 54th and he is 26th in slugging.
• Geraldo Perdomo is hitting .245 with 16 doubles, six triples, nine home runs and 73 walks. He's slugging .372 with an on-base percentage of .355.
• His batting average ranks 91st among all qualified players, his on-base percentage is 39th, and he is 121st in slugging.
• Gabriel Moreno a has .384 on-base percentage to pace the Diamondbacks.
• Nolan Arenado has 20 doubles, a triple, 20 home runs and 42 walks while batting .241.

Red Sox vs Diamondbacks Head to Head

• 8/17/2026: 11-1 BOS (Favorite: Red Sox, Spread: -1.5, Total: 9, Favorite Moneyline: -130, Underdog Moneyline: +120)
• 9/7/2025: 7-4 BOS (Favorite: Diamondbacks, Spread: -1.5, Total: 8.5, Favorite Moneyline: -108, Underdog Moneyline: -108)
• 9/6/2025: 5-1 ARI (Favorite: Red Sox, Spread: -1.5, Total: 9, Favorite Moneyline: -120, Underdog Moneyline: +102)
• 9/5/2025: 10-5 ARI (Favorite: Red Sox, Spread: -1.5, Total: 9, Favorite Moneyline: -134, Underdog Moneyline: +114)
• 8/25/2024: 7-5 ARI (Favorite: Red Sox, Spread: -1.5, Total: 9, Favorite Moneyline: -130, Underdog Moneyline: +110)
• 8/24/2024: 4-1 ARI (Favorite: Red Sox, Spread: -1.5, Total: 9.5, Favorite Moneyline: -126, Underdog Moneyline: +108)
• 8/23/2024: 12-2 ARI (Favorite: Red Sox, Spread: -1.5, Total: 9.5, Favorite Moneyline: -126, Underdog Moneyline: +108)
• 5/28/2023: 4-2 ARI (Favorite: Diamondbacks, Spread: -1.5, Total: 8.5, Favorite Moneyline: -130, Underdog Moneyline: +110)
• 5/27/2023: 2-1 BOS (Favorite: Diamondbacks, Spread: -1.5, Total: 9, Favorite Moneyline: -108, Underdog Moneyline: -108)
• 5/26/2023: 7-2 BOS (Favorite: Red Sox, Spread: -1.5, Total: 9, Favorite Moneyline: -126, Underdog Moneyline: +108)

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