Athletics vs. Boston Red Sox Prediction and Picks - September 17, 2025
Use Code WWWC Major League Baseball action on Wednesday evening, and we have an Athletics vs Red Sox prediction ready to roll. The Athletics are out of playoff contention with a 71-80 record, while Boston currently owns the 3rd American League Wildcard slot with an 82-69 mark. They have just a 2.5 game lead over the Guardians. The A's took game one by a score of 2-1. Continue reading to see our Athletics vs Red Sox prediction.
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The A's Are Looking To Play Spoiler
The Athletics opened this series with a tightly contested 2–1 win at Fenway Park, marking their fifth straight victory and their longest winning streak in over a year. The sixth inning proved decisive, with Tyler Soderstrom ripping an RBI double off the Green Monster and Brett Harris following with a go-ahead single to left. Jeffrey Springs worked around traffic in his four-inning start, and Mitch Spence delivered 3.2 innings of scoreless relief to earn the win. Hogan Harris closed the door with a four-out save, showcasing the kind of bullpen execution that’s eluded the Athletics for much of the season. The lineup produced nine hits and showed improved situational hitting, while the defense overcame a costly error to strand Boston’s tying run in the eighth.
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With the series now tilted in their favor, the Athletics have a chance to sweep a struggling Red Sox team and continue their late-season surge. They’ve won seven of their last ten and have outscored opponents by 19 runs during that stretch, leaning on a mix of power and timely contact. The offense has been anchored by Brent Rooker, Tyler Soderstrom, and Nick Kurtz—all of whom have slugged over .450 in September. The Athletics are 38–38 on the road and 52–18 when scoring five or more runs, and they’ve shown a knack for winning close games lately. If they can generate early traffic against Lucas Giolito and keep Boston’s power bats quiet, they’ll be in position to extend their momentum and flip the season series.
Mason Barnett gets the ball for the Athletics, looking to build on incremental progress in his rookie campaign. His ERA sits at 8.53, but his FIP is a more encouraging 3.78, suggesting better underlying performance. Barnett has struggled with command in the middle innings, especially against left-handed hitters, and will need to navigate Boston’s lefty-heavy lineup with precision. He’s flashed swing-and-miss stuff, striking out 11 over his last two starts, but has also allowed three home runs in that span. The bullpen remains volatile, converting just 62.7% of save chances, so length from Barnett is critical. If he can get through five and hand off a lead, the Athletics have the bats and late-inning arms to make it hold.
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Red Sox Suffer A Bad Home Loss
Boston dropped Game 1 of the series 2–1, a frustrating result for a team clinging to postseason hopes. Rookie Connelly Early dazzled in his Fenway debut, striking out seven over five innings and allowing just one run before being lifted in the sixth. Reliever Greg Wissert couldn’t hold the line, surrendering an RBI double to Soderstrom and the go-ahead single to Harris. Offensively, the Red Sox managed eight hits but failed to capitalize, going 1-for-7 with runners in scoring position and stranding six. Rob Refsnyder scored the lone run on a third-inning double, but Boston’s bats went quiet late, and the team has now lost five of its last six. The margin for error is shrinking, and urgency is mounting.
This matchup is critical for Boston, both in terms of standings and morale. They’ve been strong at home all season, posting a 45–31 record at Fenway, but recent bullpen struggles and inconsistent run production have derailed their momentum. The Red Sox have hit 177 home runs this year, ranking eighth in the AL, but they’ve been streaky—especially against teams with power arms and aggressive pitch sequencing. The Athletics have proven pesky, winning six of their last eight as underdogs and showing improved plate discipline. Boston will need to avoid early deficits and keep the ball in the yard, especially with the Athletics swinging freely in hitter-friendly conditions.
Lucas Giolito takes the mound for Boston, entering with a 10–4 record, a 3.31 ERA, and a 4.03 FIP. He’s been steady, relying on elevated fastballs and fading changeups to induce weak contact, and he’s walked just one batter over his last 13 innings. Giolito allowed two earned runs over six innings in his last start and will look to exploit the Athletics’ tendency to chase breaking balls out of the zone. The Red Sox bullpen remains thin due to injuries, so Giolito’s ability to work deep into the game is crucial. Offensively, Boston will lean on Jarren Duran and Trevor Story to set the tone early, while Alex Bregman’s plate discipline and gap power give them a reliable anchor in the middle innings.
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Athletics vs Boston Red Sox Pick
Athletics vs Red Sox Runline Pick
- Boston -1.5 (4 Units)
Boston -1.5 on the runline offers strong value given both matchup dynamics and historical performance in this price range. The Red Sox have covered the spread in 75% of games when favored by -187 or more this season, and they’ve consistently handled teams with sub-.500 records at Fenway Park. Lucas Giolito enters with a 3.31 ERA and has held opponents to one earned run or fewer in six of his last 24 starts, giving Boston a reliable edge on the mound. The Athletics, meanwhile, have struggled when facing right-handed starters with elevated fastballs, and their lineup has been prone to strikeouts in high-leverage spots. Boston’s offense ranks sixth in MLB in runs scored and fifth in batting average, and they’ve shown the ability to break games open early—especially against rookie arms like Mason Barnett.
The Red Sox also benefit from matchup leverage in the middle innings, where the Athletics’ bullpen has converted just 62.7% of save chances and allowed inherited runners to score at a 27.5% clip. With Jarren Duran, Trevor Story, and Alex Bregman all swinging well, Boston has the depth to apply pressure throughout the lineup and capitalize on any cracks in relief. The Athletics have been feisty as underdogs, winning five of their last seven in that role, but Boston’s home splits and run production profile make the -1.5 spread a favorable setup. If Giolito delivers six clean frames and the offense avoids early missed opportunities, Boston is well-positioned to win by margin and cash the runline.
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Athletics vs Red Sox Over/Under Pick
- Over 8.5 (5 Units)
This game sets up well for an Over 8.5 outcome, with both teams bringing top-10 slugging profiles and volatile bullpens into a hitter-friendly park. The Athletics rank fourth in MLB in home runs and slugging percentage, while Boston sits top-six in runs scored and fifth in batting average—a recipe for sustained traffic and multi-run innings. Mason Barnett has a 1.97 WHIP and has allowed 12 earned runs in just 12 innings, making him vulnerable to early damage, especially against Boston’s lefty-heavy lineup. On the other side, Lucas Giolito has been steady but not dominant, and the Red Sox bullpen has struggled to close clean innings. With power bats like Rooker, Soderstrom, Story, and Bregman all in rhythm, this matchup has the ingredients for a high-scoring affair that clears the total.
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