The Boston Red Sox head into tonight's opener against the Arizona Diamondbacks as a -138 moneyline favorite at Fenway Park.
That being said, I'm seeing real value in the underdogs in my Diamondbacks vs. Red Sox predictions, with Arizona raking and Mitch Bratt dealing.
Read more in my MLB picks for Monday, August 17.
Who will win Diamondbacks vs Red Sox today: Diamondbacks (+129)
The Arizona Diamondbacks send Mitch Bratt to the mound, and the left-hander has been lights out. He owns a 2.01 xERA over his last two outings after calming down from a rough patch.
Bratt has had road issues this season, but the Boston Red Sox are worse offensively at home, posting a 92 wRC+ compared to a 104 mark on the road.
This is a bullpen game for Boston. Alec Gamboa starts, but likely won’t go more than two or three innings. While the Red Sox relief corps has a respectable 3.53 FIP lately, Arizona’s offense is hard to ignore with a 133 wRC+ over its last six games.
The Diamondbacks have the edge.
Play this pick down to +110.
COVERS INTEL: The Red Sox have cooled off considerably, posting a 93 wRC+ over the last week compared to a 110 mark over the last 30 days. That gives Bratt a better matchup than Boston’s bigger-picture form suggests.
Diamondbacks vs Red Sox Over/Under pick: Under 8.5 (+109)
This total sits at 8.5, and I like the Under. Arizona’s offense is in great form, which keeps this from being a guaranteed angle, but both bullpen profiles point toward a lower-scoring contest.
Bratt has settled in recently, and Boston’s offense has come back down to earth. The Red Sox are also weaker at home, which gives Arizona’s pitching staff a better path to limit damage.
The Diamondbacks’ bullpen has been sharp, posting a 2.92 FIP over its last 19 frames while allowing just 0.47 HR/9. If Boston’s relief corps holds up in a bullpen game, this can stay under.
Play this pick up to -130.
Diamondbacks vs Red Sox home run prediction: Corbin Carroll (+474)
Corbin Carroll is in fantastic power form right now. He owns a .591 ISO over his last six games while going deep twice. Carroll is consistently getting lift on the baseball — and doing it with authority.
During that span, he owns a 45% hard-hit rate, 15% barrel rate, and 62.5% fly-ball rate. While Boston’s bullpen has done a good job limiting home runs, Carroll’s red-hot batted-ball profile is difficult to overlook.
If he gets enough lift on one tonight at Fenway, it could have enough carry to leave the ballpark.
Play this pick down to +400.
- ML/RL bets: 50-62, -19.47 units
- Over/Under bets: 62-47, +7.93 units
Diamondbacks vs Red Sox weather
Weather at Fenway Park looks mild and somewhat humid tonight, with partly cloudy skies and temperatures falling from 74°F to 71°F. Winds are light around 2–5 mph, and rain chances sit around 20–26%. There is a slight delay risk, but weather should not heavily impact scoring.
Diamondbacks vs Red Sox odds
- Moneyline: Diamondbacks +133 | Red Sox -138
- Run line: Diamondbacks +1.5 (-156) | Red Sox -1.5 (+150)
- Over/Under: Over 8.5 (-117) | Under 8.5 (+113)
Diamondbacks vs Red Sox trend
The Arizona Diamondbacks have hit the Moneyline in 11 of their last 16 away games (+10.85 Units / 66% ROI). Find more MLB betting trends for Diamondbacks vs. Red Sox.
How to watch Diamondbacks vs Red Sox and game info
| Location | Fenway Park, Boston, MA |
| Date | Monday, August 17, 2026 |
| First pitch | 7:10 p.m. ET |
| TV | DBacks.TV, NESN |
| Diamondbacks starting pitcher | Mitch Bratt (1-1, 3.74 ERA) |
| Red Sox starting pitcher | Alec Gamboa (0-0, 1.59 ERA) |
Diamondbacks vs Red Sox latest injuries
Odds are correct at the time of publishing and are subject to change.
Not intended for use in MA.
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