Red Sox vs Diamondbacks Prediction, Odds, Moneyline, Spread & Over/Under for Aug. 19

Odds updated as of 3:12 p.m.

The MLB schedule on Wednesday includes the Boston Red Sox taking on the Arizona Diamondbacks.

All the info you need to make smart bets on this game at FanDuel Sportsbook can be found below. Check out all of the latest MLB betting lines here.

Red Sox vs Diamondbacks Game Info

• Boston Red Sox (68-58) vs. Arizona Diamondbacks (66-61)
• Date: Wednesday, August 19, 2026
• Time: 4:10 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: (-158) | ARI: (+146)
• Spread: BOS: -1.5 (+130) | ARI: +1.5 (-156)
• Total: 8 -- Over: (-114) | Under: (-106)

Red Sox vs Diamondbacks Probable Starting Pitchers

Probable Pitchers: Payton Tolle (Red Sox) - 8-6, 2.97 ERA vs Brandon Pfaadt (Diamondbacks) - 7-1, 3.11 ERA

This contest's pitching matchup is set, as the Red Sox will send Payton Tolle (8-6) to the mound, while Brandon Pfaadt (7-1) will answer the bell for the Diamondbacks. Tolle's team is 8-12-0 against the spread in his starts this season. Tolle's team has been victorious in 69.2% of the games he's started as the moneyline favorite with a record of 9-4. When Pfaadt starts, the Diamondbacks are 11-1-0 against the spread. The Diamondbacks have been the underdog on the moneyline in seven of Pfaadt's starts this season, and they went 5-2 in those games.

Red Sox vs Diamondbacks Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Red Sox win (61.4%)

Red Sox vs Diamondbacks Moneyline

• Boston is a -158 favorite on the moneyline, while Arizona is a +146 underdog on the road.

Red Sox vs Diamondbacks Spread

• The Red Sox are hosting the Diamondbacks and are favored by 1.5 runs on the spread. The Red Sox are +130 to cover the runline, with the Diamondbacks being -156.

Red Sox vs Diamondbacks Over/Under

• A combined run total of 8 has been set for Red Sox-Diamondbacks on Aug. 19, with the over at -114 and the under at -106.

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Red Sox vs Diamondbacks Betting Trends

• The Red Sox have been victorious in 45, or 52.9%, of the 85 contests they have been chosen as favorites in this season.
• This season Boston has come away with a win 12 times in 19 chances when named as a favorite of at least -158 on the moneyline.
• The Red Sox and their opponents have gone over in 56 of their 124 games with a total set by sportsbooks this season.
• In 124 games with a line this season, the Red Sox have a mark of 61-63-0 against the spread.
• The Diamondbacks have won 32 of the 71 games they were the moneyline underdog this season (45.1%).
• In games it has played as a moneyline underdog with odds of +146 or longer, Arizona has a record of 8-8 (50%).
• The Diamondbacks have played in 126 games with an over/under set, and have combined with opponents to go over the total 54 times (54-68-4).
• The Diamondbacks have put together a 67-59-0 record against the spread this season (covering 53.2% of the time).

Red Sox Player Leaders

• Wilyer Abreu is hitting .257 with 27 doubles, three triples, 22 home runs and 57 walks. He has an on-base percentage of .336 while slugging .469.
• Among all qualifying hitters in the majors, his batting average ranks 72nd, his on-base percentage ranks 67th, and he is 36th in slugging.
• Ceddanne Rafaela has hit 16 homers this season while driving in 64 runs. He's batting .287 this season and slugging .468 with an on-base percentage of .324.
• Among qualified hitters, he ranks 17th in batting average, 85th in on-base percentage and 37th in slugging percentage.
• Rafaela has picked up at least one hit in two games in a row. During his last five outings he is batting .304 with four doubles and an RBI.
• Willson Contreras has 112 hits and an OBP of .393, both of which lead the Red Sox this season.
• Contreras heads into this matchup with two games in a row with at least one hit. During his last five outings he is batting .333 with three doubles, a home run, four walks and three RBIs.
• Caleb Durbin has been key for Boston with 103 hits, an OBP of .328 plus a slugging percentage of .408.
• Durbin brings a four-game hitting streak into this game. During his last five outings he is hitting .353 with three walks and two RBIs.

Diamondbacks Player Leaders

• Corbin Carroll has racked up a slugging percentage of .486 and has 113 hits, both team-high marks for the Diamondbacks. He's batting .246 and with an on-base percentage of .345.
• Including all the qualified hitters in the big leagues, his batting average puts him 87th, his on-base percentage ranks 52nd, and he is 26th in slugging.
• Geraldo Perdomo has 17 doubles, six triples, nine home runs and 74 walks while batting .246. He's slugging .374 with an on-base percentage of .356.
• Including all qualifying hitters, his batting average places him 87th, his on-base percentage ranks 39th, and he is 119th in slugging.
• Gabriel Moreno has accumulated an on-base percentage of .385, a team-high for the Diamondbacks.
• Nolan Arenado is batting .241 with 20 doubles, a triple, 20 home runs and 42 walks.

Red Sox vs Diamondbacks Head to Head

• 8/18/2026: 9-4 BOS (Favorite: Red Sox, Spread: -1.5, Total: 7.5, Favorite Moneyline: -166, Underdog Moneyline: +152)
• 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)

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