Venue: Fenway Park, Boston, Massachusetts
First pitch: 4:10 p.m. ET
TV: NESN / Arizona Sports Network (ARID) / MLB.TV
This interleague matchup pits the third-place NL West Diamondbacks against the third-place AL East Red Sox. Arizona is trying to halt a three-game road losing streak, while Boston hosts the rubber match of the three-game set (this is the third meeting of the season between the clubs).
Probable Starting Pitchers
Diamondbacks: RHP Brandon Pfaadt (7-1, 3.11 ERA, 1.13 WHIP, 61 K in 92.2 IP). Excellent win-loss record with strong command; has been highly effective in recent starts (including a shutout-caliber outing).
Red Sox: LHP Payton Tolle (8-6, 2.97 ERA, 1.06 WHIP, 128 K in 115.0 IP). Strong strikeout pitcher with excellent control; owns one of the better ERAs among Boston starters this season.
Both starters enter with sub-3.20 ERAs, setting up a high-quality pitching duel.
Current Weather Forecast (Fenway Park)
Mostly sunny with patchy morning fog possible. High near 85–86°F; game-time temperatures expected in the low-to-mid 80s°F. Southwest winds 5–10 mph. Very low chance of precipitation. Comfortable afternoon conditions for baseball.
Injury Reports
Arizona Diamondbacks:
Nolan Arenado (3B) – Day-to-day (neck).
Ketel Marte (2B) – Out (left knee; undergoing MRI).
Tommy Troy (OF) – 10-day IL (shoulder).
Ryan Thompson (RP) and Drey Jameson (RP) – 15-day IL.
Longer-term: Zac Gallen, Ryne Nelson, Corbin Burnes, A.J. Puk, and others (mostly elbow-related).
Key active: Corbin Carroll (speed/power), Gabriel Moreno (.308 AVG), Geraldo Perdomo, and the supporting cast.
Boston Red Sox:
Jahmai Jones (DH) – Day-to-day (undisclosed).
Trevor Story (SS) – 60-day IL (abdomen).
Isiah Kiner-Falefa (INF) – 60-day IL (forearm).
Roman Anthony (OF) – 60-day IL (wrist).
Garrett Whitlock (RP) – 15-day IL (elbow).
Longer-term: Triston Casas, Garrett Crochet, Tanner Houck, Kutter Crawford, Masataka Yoshida (hamstring), and others.
Key active: Willson Contreras (25 HR, strong extra-base production), Ceddanne Rafaela, Wilyer Abreu, and Jarren Duran.
Key Player Matchups & Notable Performers
Pfaadt vs. Red Sox hitters: Willson Contreras (power/RBI leader) and Ceddanne Rafaela present the biggest challenges. Wilyer Abreu has been productive lately.
Tolle vs. Diamondbacks hitters: Corbin Carroll (multi-dimensional threat) and Gabriel Moreno are primary dangers. Arizona’s offense has been solid when collecting 8+ hits (47-24 record in those games).
Both clubs average roughly 4.5 runs per game with similar power numbers. Fenway’s dimensions and the Green Monster can influence extra-base outcomes.
Recent Team Forms
Diamondbacks: 4-6 in last 10; on a three-game road skid. Road record 30-34. Strong when generating hits.
Red Sox: 4-6 in last 10; competitive at home (31-31). Excel when hitting multiple home runs (25-9).
Series History
This is the third meeting of the 2026 season (final game of the current three-game set at Fenway). Limited prior data shows competitive interleague play between the clubs.
Betting Trends
Trends: Boston favored at home behind the strong left-handed starter. Arizona competitive as road underdogs but struggling on the current road trip.
Game Odds
Arizona Diamondbacks 8.5
Boston Red Sox – 142
Odds Courtesy of Sports Odds Direct as of Tuesday, August 18, 2026
