The Chicago Cubs and Boston Red Sox close the 2026 regular season at Fenway Park, and the market is treating Friday night as a coin flip. The Cubs sit at -117 on the moneyline, the Red Sox at -103, and the total has settled at 6.5. Both have clinched. However, only one still has something riding on the weekend, and that gap drives our headline play.
Last Updated: Friday, September 25, 2026
Chicago Cubs vs. Boston Red Sox — Time & How to Watch
| Where | Fenway Park, Boston, Massachusetts |
| When | Friday, September 25, 2026 — 6:05 p.m. ET (Game 2 of a split doubleheader) |
| TV | NESN, Marquee Sports Network |
Chicago Cubs vs. Boston Red Sox Betting Preview
This is the nightcap of a split doubleheader. Sunday’s finale was moved up to Friday by the clubs and Major League Baseball, leaving a 1:05 p.m. ET opener and this 6:05 p.m. ET nightcap. The teams had not met in 2026.
Chicago is expected to start left-hander David Peterson, whose 9-8 record and 4.96 ERA undersell him. Since the All-Star break he is 5-1 with a 2.95 ERA over 12 starts. His last two outings were near-copies: six innings of one-run ball, seven strikeouts each. His 4.03 FIP and 8.23 K/9 read better than the ERA. The caution is command: he walks 3.96 per nine, and traffic is how his innings get long.
Boston counters with right-hander Brayan Bello, whose 6-7 record and 4.49 ERA are stale the same way. Over his last 13 appearances he owns a 2.28 ERA and 1.01 WHIP, with 46 strikeouts in 51.1 innings. His latest turn was his best of the year: eight innings at Tampa Bay, one run, no walks, 11 strikeouts. Both starters arrive hot despite their season ERAs.
The lineups tell a different story. The Cubs have averaged 5.31 runs per game this season, Boston 4.31. More to the point, the Red Sox have gone cold at the wrong time, scoring 22 runs over their last 10 games while going 4-6. Chicago is 88-71, Boston 85-74, and both are in the postseason field. Still, the Cubs are sorting out seeding, while Boston is reported as settled at No. 5.
Chicago Cubs vs. Boston Red Sox Odds
| Run Line | Moneyline | Total | |
|---|---|---|---|
| Cubs | -1.5 (+165) | -117 | U 6.5 (-105) |
| Red Sox | +1.5 (-195) | -103 | O 6.5 (-115) |
Odds accurate as of Friday, September 25, 2026 via TheSpread.com. Odds change, get the latest MLB Odds – Futures – Props
Cubs vs. Red Sox Prediction — Does the Seeding Race Tilt This One?
The most load-bearing signal is not a pitching edge. It is what each club is playing for. Chicago’s spot is secure, but its seed is not, and where the Cubs finish decides whether they host a wild-card round or travel. Boston is effectively set at No. 5. In game two of a doubleheader on the second-to-last day, those situations rarely produce the same lineup card.
The bullpen picture points the same way. Chicago’s staff arrived rested by design, as Matthew Boyd worked seven innings in Thursday’s clinching win to keep arms available. Boston opens Game 1 with a reliever rather than a starter, so its pen absorbs innings first. A rested bullpen against a taxed one is a small edge that compounds late.
The case against is real. Bello has been Boston’s best pitcher for a month, and an eight-inning, 11-strikeout outing is no fluke. Peterson’s walk rate also hands a patient lineup early traffic. The market has refused to move, too: the moneyline opened at these exact prices and has not budged a cent. That reads as a respected number, not a soft one.
The Pick: Cubs Moneyline (-117)
Cubs vs. Red Sox Prediction — Can Either Lineup Solve a Hot Arm?
The run environment is the second readable angle, and it rests on the same observation as the first. Boston is not scoring. Twenty-two runs in 10 games is roughly half their season rate, and that slump meets a left-hander who has allowed one earned run in each of his last two starts. Bello has a 1.01 WHIP over 13 appearances. Both can work into the sixth, keeping two shaky bullpens off the field.
The counterweight is substantial. Fenway inflates runs on a multi-year basis, through doubles and extra-base hits rather than homers. A 6.5 total is already low here, and the market arrived on its own: the number posted higher and came down before first pitch. Whatever value existed has largely been taken. Peterson’s walks also argue the other way.
The Pick: Under 6.5 (-105)
Final Thoughts and Bonus Angle
Both plays lean on the same read: Boston’s lineup is slumping, and its motivation is lower than Chicago’s. That is worth saying plainly rather than dressing the picks up as independent. If the Red Sox bats wake up, both positions come under pressure at once. Anyone taking one should take the side, which has the wider margin for error.
We are passing on a third angle rather than forcing one. The Cubs at -1.5 tempt at +165, and a road favorite does bat in the ninth even when leading. However, every other indicator points toward a one-run night: a pick’em moneyline, a 6.5 total, and a run line drifting toward Boston’s +1.5. That is the wrong profile for laying a run and a half. See our Marlins-Cubs pick from Sept. 24 and Guardians-Red Sox pick from Sept. 24.
Our picks for this game, together: Cubs Moneyline (-117) and Under 6.5 (-105).
MLB Cubs vs. Red Sox FAQ: Friday September 25, 2026
What time does the Chicago Cubs vs. Boston Red Sox game start?
First pitch is 6:05 p.m. ET on Friday, September 25, 2026. This is game two of a split doubleheader at Fenway Park, following a 1:05 p.m. ET opener. The nightcap was originally set for 7:10 p.m. ET before the clubs and MLB adjusted the schedule.
What channel is the Chicago Cubs vs. Boston Red Sox game on?
The game airs on NESN in the Boston market and Marquee Sports Network in Chicago. Radio runs in English on WEEI 93.7 FM and in Spanish on WESX 1230 AM and WCCM 1490 AM. Both feeds are also on MLB.TV, subject to local blackout rules.
Where are the Chicago Cubs and Boston Red Sox playing today?
Both games are at Fenway Park in Boston, Massachusetts. The ballpark has been the Red Sox home since 1912 and is the oldest venue in Major League Baseball. It plays run-friendly on a multi-year basis, mostly through doubles and extra-base hits rather than homers.
Who won the last meeting between the Chicago Cubs and Boston Red Sox?
Boston won the last meeting 6-1 on July 20, 2025, at Wrigley Field, with Garrett Crochet earning the win. Chicago took that series two games to one. The clubs did not meet earlier in 2026, so this weekend at Fenway is their entire season series.
Where do the Chicago Cubs and Boston Red Sox stand in their divisions?
Chicago is 88-71 and sits second in the National League Central, 12 games back of Milwaukee. Boston is 85-74 and third in the American League East, 11.5 back of Tampa Bay. Both have clinched postseason berths as wild cards, though the Cubs are still settling their seed.