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

Odds updated as of 7:12 p.m.

The Boston Red Sox are among the MLB squads playing on Tuesday, versus the Arizona Diamondbacks.

Before checking out the MLB betting lines on FanDuel Sportsbook, we've got you covered, in terms of the vital info about this game.

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: (-166) | ARI: (+152)
• Spread: BOS: -1.5 (+125) | ARI: +1.5 (-150)
• Total: 7.5 -- Over: (-120) | Under: (-102)

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 answer the bell for the Diamondbacks. Suarez and his team are 11-10-0 ATS this season when he starts. Suarez's team has won 53.3% of his starts when they are favored on the moneyline (8-7). The Diamondbacks are 12-10-0 ATS in Kelly's 22 starts that had a set 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 (61%)

Red Sox vs Diamondbacks Moneyline

• Boston is the favorite, -166 on the moneyline, while Arizona is a +152 underdog on the road.

Red Sox vs Diamondbacks Spread

• The Diamondbacks are +1.5 on the spread (-150 to cover), and Boston is +125 to cover the runline.

Red Sox vs Diamondbacks Over/Under

• Red Sox versus Diamondbacks, on Aug. 18, has an over/under of 7.5, with the over being -120 and the under -102.

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

Red Sox vs Diamondbacks Betting Trends

• The Red Sox have been victorious in 44, or 52.4%, of the 84 contests they have been chosen as favorites in this season.
• This year Boston has won six of 12 games when listed as at least -166 on the moneyline.
• The Red Sox and their opponents have hit the over in 55 of their 123 games with a total set by oddsmakers this season.
• In 123 games with a line this season, the Red Sox have a mark of 60-63-0 against the spread.
• The Diamondbacks have won 32 of the 70 games they were the underdog on the moneyline this season (45.7%).
• Arizona has a record of 7-6 in games it has played as a moneyline underdog with odds of +152 or longer (53.8%).
• In the 125 games oddsmakers have set an over/under for the Diamondbacks, they have combined with opponents to go over the total 53 times (53-68-4).
• The Diamondbacks have covered 53.6% of their games this season, going 67-58-0 against the spread.

Red Sox Player Leaders

• Wilyer Abreu has 27 doubles, three triples, 22 home runs and 56 walks while hitting .259. He has an on-base percentage of .337 and a slugging percentage of .473.
• Among all qualified hitters in MLB, his batting average ranks 67th, his on-base percentage ranks 64th, and he is 33rd in slugging.
• Ceddanne Rafaela has hit 16 homers this season while driving in 64 runs. He's batting .288 this season and slugging .470 with an on-base percentage of .325.
• He is 16th in batting average, 83rd in on-base percentage and 37th in slugging in the major leagues.
• Willson Contreras leads Boston with 110 hits and an OBP of .391 this season.
• Caleb Durbin is batting .257 with a .327 OBP and 61 RBI for Boston this season.
• Durbin has safely hit in three straight games. In his last five games he is hitting .421 with a home run, three walks and six RBIs.

Diamondbacks Player Leaders

• Corbin Carroll has a slugging percentage of .488 and has 113 hits, both team-best marks for the Diamondbacks. He's batting .247 and with an on-base percentage of .344.
• He is 87th in batting average, 54th in on-base percentage and 26th in slugging percentage among all qualifying hitters in MLB.
• Geraldo Perdomo has 16 doubles, six triples, nine home runs and 73 walks while batting .245. He's slugging .372 with an on-base percentage of .355.
• He is 91st in batting average, 39th in on-base percentage and 121st in slugging percentage in the big leagues.
• Gabriel Moreno has accumulated a team-best .384 on-base percentage.
• Nolan Arenado is hitting .241 with 20 doubles, a triple, 20 home runs and 42 walks.

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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