Arizona Diamondbacks vs. Boston Red Sox Picks and Prediction for Monday, August 17, 2026

The Arizona Diamondbacks and Boston Red Sox open a three-game interleague series Monday night at Fenway Park in Boston, Massachusetts, with the first pitch scheduled for 7:10 p.m. ET. MLB.TV will provide coverage. Arizona enters at 66-58 overall and 30-31 on the road, while Boston is 66-57 overall and 29-31 at home. The Diamondbacks have won two straight games, while the Red Sox are coming off a victory but have dropped three of their last five. At the time of this writing the odds were not released. Before betting Monday’s MLB schedule, check out our free MLB picks for more predictions and analysis from around the league.

Starting Pitchers

Mitch Bratt gets the start for Arizona and enters Monday at 1-1 with a 3.74 ERA and 1.40 WHIP through 33.2 innings. Bratt has allowed 28 hits while recording 25 strikeouts against 19 walks and surrendering five home runs. Boston had not announced a starting pitcher at the time of this preview, leaving one side of the pitching matchup uncertain. Bratt has limited opponents reasonably well from a run-prevention standpoint, but the 1.40 WHIP and 19 walks over 33.2 innings show that controlling baserunners will be important at Fenway Park.

Diamondbacks Arrive in Boston With Momentum

Arizona comes into this series at 66-58 overall and sits eight games behind the division leader. The Diamondbacks are nearly even away from home at 30-31 and have won three of their last five games. They arrive in Boston after consecutive road victories by scores of 10-3 and 2-0. Arizona also recorded a 9-0 victory during its current five-game stretch, with the two losses coming by scores of 6-4 and 3-2.

The Diamondbacks are batting .244 with a .317 on-base percentage and .399 slugging percentage. Arizona has accumulated 1,017 hits, scored 564 runs and hit 122 home runs. The pitching staff carries a 4.08 ERA and 1.27 WHIP while allowing opponents to bat .250. Arizona pitchers have recorded 844 strikeouts against 359 walks.

Arizona's recent run prevention stands out. The Diamondbacks have surrendered only 12 runs over their last five games, including two shutout victories. They have also scored 27 runs during that stretch. The season-long pitching numbers favor Boston, but Arizona enters Monday playing some of its better baseball, and its recent combination of offense and run prevention makes this a much more competitive matchup than the overall pitching statistics alone suggest.

Red Sox Own the Stronger Pitching Numbers

Boston enters the series at 66-57 overall, giving the Red Sox essentially the same record as Arizona. Surprisingly, Fenway Park has not provided much of an advantage this season, with Boston sitting at 29-31 at home. The Red Sox have won two of their last five games, with those victories coming by scores of 4-0 and 7-0. Their three losses were 8-4, 6-4 and 5-3, making recent Boston results highly dependent on whether its pitching can control the game.

The Red Sox are batting .248 with a .321 on-base percentage and .401 slugging percentage. Boston has collected 1,021 hits, scored 546 runs and hit 123 home runs. The pitching staff has been the stronger part of the overall profile, producing a 3.48 ERA and 1.22 WHIP while limiting opponents to a .239 batting average. Boston pitchers have recorded 1,052 strikeouts against 344 walks.

Boston owns small offensive advantages in batting average, on-base percentage, slugging percentage, hits and home runs, but Arizona has actually scored 18 more runs. The more significant Boston advantage comes on the mound, where the Red Sox have the lower ERA, lower WHIP and better opponent batting average. The uncertainty surrounding Monday's starter makes it difficult to give Boston full credit for those advantages in this particular matchup, especially against an Arizona club that has been playing well.

Arizona Diamondbacks vs. Boston Red Sox Picks and Prediction

Pick: Arizona Diamondbacks ML

Arizona is worth backing as the road side in what appears to be a relatively even matchup. The Diamondbacks and Red Sox have almost identical overall records, while neither club has been particularly impressive in the relevant home-road split. Arizona is 30-31 on the road compared with Boston's 29-31 home record. The Diamondbacks have also won three of their last five and enter on a two-game winning streak after outscoring Atlanta 12-3 in those contests. Boston's stronger season-long pitching numbers are a concern, but without a confirmed starter, Arizona offers the more appealing side based on the information available.

Pick: Arizona Diamondbacks ML

Pick: Under 9.0

The recent results make the under attractive if the total is set around nine runs. Arizona has recorded two shutouts over its last five games, while Boston has also produced two shutout victories during its last five. The Diamondbacks have allowed just 12 total runs during that stretch, and Boston owns a strong 3.48 team ERA and 1.22 WHIP for the season. Fenway can create offensive opportunities, and Boston's unknown pitching situation adds uncertainty, but nine runs provides enough margin to favor the lower-scoring side.

Take the Under if the total is set at 9.0.

Preview completed before game play on Sunday.