Arizona Diamondbacks vs Boston Red Sox Prediction, 8/18/2026 MLB Picks, Best Bets & Odds

Game: Arizona Diamondbacks vs Boston Red Sox

Date: Tuesday, August 18, 2026

Location: Fenway Park in Boston, MA

TV: NESN

Odds/Point Spread: Arizona (+150) Boston (-182)

Fenway Park is the location where the Boston Red Sox (66-58) will meet the Arizona Diamondbacks (66-59) on Tuesday. The moneyline on this game has Arizona at +150 while Boston is sitting at -182. The total has been set at 8.5. The pitchers taking the mound are Merrill Kelly and Ranger Suarez.

Arizona has a slugging rate of .399 and have struck out 912 times, while being walked on 419 occasions. They have amassed 539 RBI's and 1,023 hits so far this year, and their batting average is at .244. The Diamondbacks have accrued 214 doubles as a team and have hit 124 baseballs out of the stadium. They have earned a total of 567 runs and hold an on-base percentage of .316. As a unit, the Arizona Diamondbacks are knocking in 4.5 runs per game, which has them at 12th in the league.

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They have a K/BB ratio of 2.35 and their pitching staff has a collective WHIP of 1.27. Diamondbacks pitchers have surrendered 142 home runs and 549 total runs (15th in baseball). Arizona has conceded 1,053 base hits (8.5 per 9 innings) as well as 504 earned runs. The Diamondbacks are sitting with a team ERA of 4.09 for the season (14th in the league), and the staff has rung up 852 batters. Their pitching staff has walked 362 opposing batters and their FIP is 4.31 as a squad for the season.

Diamondbacks pitchers have come into the game with runners on 107 times and also have had 133 appearances in high leverage situations. The bullpen have a total of 71 holds for the year (10th in the league). The Diamondbacks relief pitchers have recorded a save percentage of 67.4% and have stepped onto the mound in 118 save situations. They have earned 31 saves so far this year and have missed out on 15 of 46 save opportunities. The relief pitchers have inherited 159 base runners on the campaign with 25.2% of them earned a run for their team. The Diamondbacks have dispatched 410 relievers to the hill for the season.

The Arizona Diamondbacks have amassed 3,330 putouts at this point in the season, as well as 1,092 assists and 45 errors. Their fielding percentage is at .990 which ranks 1st in pro baseball, and have earned 113 double plays. The Diamondbacks have transformed 71.3% of baseballs in play into outs out of 9,990 innings on the diamond, which has them sitting 7th in pro baseball.

Kelly has taken the ball for 1,133 innings and has 993 K's so far in his career. His ERA is 3.92 (493 earned runs allowed) and he has a WHIP of 1.228. He has allowed 1,039 hits (8.3 hits per nine innings) and has had 353 walks. Kelly (73-63 career mark) has earned a FIP of 3.86 and he has faced 4,685 batters during his time in the majors.

The Boston Red Sox have a team OBP of .320 as well as a team batting average of .248 this year. They have struck out on 1,021 occasions (18th in baseball) and have accounted for 1,026 hits. Boston is sitting with 124 long balls on the campaign as well as 525 RBIs. The Red Sox hold a team SLG% of .400 and they have an average of 4.43 runs per game (17th in the league). They have hit 224 doubles, while getting a free base 393 times and recording 549 runs.

The Red Sox have a team WHIP of 1.222 and are the owners of a FIP of 3.64 as a team over the course of the season. They are currently ranked 12th in MLB as a pitching staff in total hits given up with 997. The Boston pitching staff have conceded 468 runs for the year while holding an ERA of 3.52 (431 earned runs yielded). They currently have a K/BB ratio of 8.70 (1,059 strikeouts against 348 bases on balls). They have surrendered 119 long balls and they relinquish 3.83 runs per 9 innings (3rd in MLB).

They sit at 3rd in the league with a save percentage of 75.6%, and they have dispatched 379 relievers to the hill this season. Their bullpen pitchers have come in 108 times in high leverage situations in addition to 95 occasions with runners on base. Sitting with 123 save situations, the Red Sox have tallied 76 holds and also 11 blown saves. Boston has called on relievers to step onto the mound in 45 save opportunities and they have tallied 34 saves. Boston relief pitchers have an inherited score percentage of 32.3% of 130 inherited runners.

The Boston Red Sox have gotten 90 double plays and own a fielding percentage of .986 (15th in MLB). The Red Sox have racked up 1,075 assists, 61 errors and have amassed 3,304 putouts so far this season. In their 9,912 innings on the diamond, the Red Sox have accumulated a defensive efficiency of 69.7% (17th in pro baseball).

So far in his pro baseball career, Suarez has given up 825 base hits while he has accumulated 815 K's in 870 innings pitched. He has surrendered 325 earned runs while holding a WHIP of 1.260 and being the owner of a FIP of 3.3. His strikeout to walk ratio is 3.01 and he has gone up against 3,642 batters so far in his career. Suarez (57-40 win-loss record in his career) has earned a 3.36 ERA while conceding 8.5 hits per nine innings.

Who will win tonight's MLB game against the spread or moneyline?

Tony Sink's Pick: Take Arizona (+150)

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