The Chicago Cubs open a three-game series at loanDepot park on Friday night as a road favorite at -140, with the total posted at 8. The starting pitching matchup cuts against that price. Shota Imanaga carries a respectable 4.01 ERA, yet he has become the most home-run-prone starter in baseball. Janson Junk has been quietly stingy without missing bats. One of our two plays leans on the ballpark itself.
Last Updated: Friday, September 4, 2026
Chicago Cubs vs. Miami Marlins — Time & How to Watch
| Where | loanDepot park, Miami, Florida |
| When | Friday, September 4 – 7:10 p.m. ET |
| TV | Marquee Sports Network / Marlins.TV |
Chicago Cubs vs. Miami Marlins Betting Preview
Start with the arms, because they explain the number. Imanaga takes the ball at 8-10 with a 4.01 ERA, a 1.14 WHIP and 148 strikeouts in 150.1 innings. That surface line reads like a solid mid-rotation starter. The underlying trend does not. He has allowed 33 home runs, tied for the most in the majors, with eight of them across his past four outings. His August 30 start against Cincinnati was the sixth time this season he surrendered three or more homers in a game, a Chicago single-season record that passed Greg Maddux’s five in 2004.
The volatility shows up in his workload too. Imanaga gave up six earned runs over five innings to the Reds, and before that he was pulled after two innings in Seattle. He did post a 10-strikeout, six-inning start against the White Sox in mid-August, so the stuff has not vanished. Still, only one of his last five turns reached six innings.
Junk offers the opposite profile. The Miami right-hander is 6-8 with a 4.11 ERA and a 1.30 WHIP, and he has just 70 strikeouts. He does not miss bats. What he has done lately is limit damage. Across his last four starts he allowed one earned run in 4.2 innings at Washington, one in 4.2 innings against Washington, two in five innings at Philadelphia and one in six innings against Pittsburgh.
The catch is length. Junk has not passed six innings in any of those starts, and he recorded only two strikeouts in each. Miami’s bullpen therefore projects to cover four innings or more. Chicago enters at 79-62, second in the NL Central, having scored 751 runs in 140 games for a 5.36 average. Miami sits 71-70 and third in the NL East at 4.37 runs per game, per Baseball Reference. That gap is the best argument for the favorite, as our recent Cubs betting coverage also noted.
Chicago Cubs vs. Miami Marlins Odds
| Run Line | Moneyline | Total | |
|---|---|---|---|
| Cubs | -1.5 (+125) | -140 | U 8 (-115) |
| Marlins | +1.5 (-145) | +117 | O 8 (-105) |
Odds accurate as of September 4, 2026 via TheSpread.com. Odds change, get the latest MLB Odds – Futures – Props
Chicago Cubs vs. Miami Marlins — Who Is the Public Betting?
| Cubs | 71% | 29% | Marlins |
See the latest MLB Public Betting Splits and make smarter wagers!
Cubs vs. Marlins Prediction — Will Offenses be Contained?
The most load-bearing signal is the venue. loanDepot park suppresses home runs by roughly 10 percent relative to league average across published 2026 park-factor sets. That matters tonight, because the long ball is the specific way Imanaga gets hurt. Take it out of his profile and what remains is a left-hander with a 1.14 WHIP and 148 strikeouts in 150.1 innings.
On the other side, Junk has held four straight opponents to two earned runs or fewer. He works to contact rather than through it, and a Miami lineup averaging 4.37 runs per game does not need much support to keep a game in the 3-2 range. Meanwhile, the market leans the same way. The total opened at 8 and has not moved a half-run or a cent of juice, with the under carrying the -115 price. Totals attached to heavily backed favorites usually drift upward. This one has not budged.
The counter-case is real. Neither starter projects to work deep, so both bullpens will be exposed by the sixth, and relief innings are where totals get blown open. Chicago’s offense is also the best either club will see this weekend, and a three-run fourth changes the arithmetic quickly. Still, the park, the home starter’s recent form and the frozen number line up together.
The Pick: Under 8 (-115)
Cubs vs. Marlins Prediction — Can Miami Hang Around?
The market read drives this one. Public tickets sit at 71 percent on Chicago’s run line and 80 percent on its moneyline, yet the price has moved only from -135 to -140 since opening, while the run line shortened from +130 to +125. That is movement with the public, not against it, so there is no reverse line move to cite. What there is instead is a very small adjustment for a very lopsided ticket count. When four of five bets land on one side and the number barely responds, the money behind them is not proportionate to their volume.
Pair that with the projection above. If this game plays under a total of 8, it is close by definition. A home underdog at +117 needs to win 46.1 percent of the time to break even. Asking Miami to win a low-scoring home game behind a starter who has allowed two earned runs or fewer in four straight is a shorter ask than that price implies. The honest caveat is that this play and the total rest on the same pitcher. Junk getting knocked around early sinks both.
The Pick: Marlins Moneyline (+117)
Final Thoughts and Bonus Angle
The alternative we considered and passed on was Chicago’s run line at +125. The logic is sound on paper. Road favorites are better candidates for -1.5 than home favorites, because the visitors always bat in the ninth and get an extra chance to extend a lead. Chicago also holds the offensive edge. However, a -1.5 play needs a comfortable win, and every other read here points toward a tight, low-scoring night. Our recent Marlins betting coverage tracks how Miami has been pricing out at home.
Watch the fifth and sixth innings. Junk has been pulled between 4.2 and six innings in each of his last four starts, and Imanaga has reached six only once in his last five. Whichever bullpen enters first, and with what margin, will likely decide both positions. Both plays are leans rather than convictions, and both fail the same way: if Chicago’s lineup gets to Junk the first time through the order.
Recap of our picks: Under 8 (-115) and Marlins Moneyline (+117).
MLB Cubs vs. Marlins FAQ: Friday September 4, 2026
What time does the Cubs vs. Marlins game start?
First pitch is 7:10 p.m. ET on Friday, September 4, 2026. It is the opener of a three-game weekend series at loanDepot park, with the middle game Saturday and the finale Sunday before both clubs move on to new opponents next week.
What channel is the Cubs vs. Marlins game on?
The game airs on Marquee Sports Network for the Chicago market and Marlins.TV for the Miami market. Regional blackout rules apply, so availability depends on your location and provider. No national television window is attached to this matchup on the official league listing.
Who is pitching for the Marlins tonight?
Right-hander Janson Junk starts for Miami. He enters at 6-8 with a 4.11 ERA, a 1.30 WHIP and 70 strikeouts on the season. He has allowed two earned runs or fewer in each of his last four starts, though he has not completed more than six innings in any of them.
Where are the Cubs and Marlins playing today?
The game is at loanDepot park in Miami, Florida, the Marlins’ home ballpark. It is a retractable-roof venue that plays roughly 10 percent below league average for home runs, which makes it one of the tougher parks in baseball for power hitters.
Where do the Cubs and Marlins stand in their divisions?
Chicago is 79-62 and second in the NL Central, trailing Milwaukee. Miami is 71-70 and third in the NL East, behind Atlanta and Philadelphia. The Cubs remain in strong postseason position, while the Marlins need a September run to stay in the National League wild card conversation.