Chicago Cubs vs Cincinnati Reds Prediction — Sunday, September 20, 2026

Our Chicago Cubs vs Cincinnati Reds prediction for Sunday, September 20 at 1:40 PM ET comes with a number attached and a decision not to act on it. The Cubs sit as moneyline favorites at -164 to close out this series in Cincinnati, and on paper the pitching matchup looks like it should favor Chicago again. The model landed on Cubs as the stronger side. It just isn't backing that lean with a bet.

That distinction matters. A PASS on an official-card sport means exactly what it says: no stake, no action, nothing tracked on the ledger for this one. The reasoning behind the side is real and worth walking through, but the price and the shape of this matchup didn't clear the bar the model needs before it turns an opinion into a bet.

Why the model likes Cubs on paper

The building block here is a specific, recent data point. Cincinnati's starter for this one, Lowder, already faced this same Cubs lineup on August 28 and turned in a clean line: 5 innings, 3 runs allowed, zero walks. That's a real, dated result against the exact opponent he sees again Sunday, not a generic form read. Command guys who limit walks tend to repeat their process start to start, and there's nothing here suggesting that outing was a fluke rather than his baseline.

The problem is what sits on the other side of the mound. Cincinnati's lineup has hit 203 home runs on the season, and it's lining up against a Chicago pitching staff that surrenders 1.48 home runs per nine innings. That's not a small leak. Pair it with 28 blown saves on the year and you've got a bullpen that has repeatedly failed to hold leads late. So even in a game where the Cubs starter does his job, the version of Chicago's pitching staff that shows up in the middle and late innings has been genuinely shaky all season.

The case against betting it

This is where the PASS comes from. The model isn't saying Cincinnati wins Sunday. It's saying the full picture, Lowder's specific track record against this lineup balanced against Chicago's homer-prone staff and its bullpen's late-game failures, doesn't add up to a clean enough read to make -164 worth laying. A favorite at that price needs to clear a real bar before it's worth backing, and this matchup has too much tension pulling in both directions to clear it.

We're not going to guess at which specific factor kept this off the board, and we're not going to dress up a no-play as some kind of soft lean. It isn't one. This is simply not a bet the model is making today, full stop. The favorite-versus-homer-risk tension described above is the honest why. Anything more specific than that would be us inventing certainty we don't have.

The number that matters

If you're pricing this game yourself, the two figures worth holding onto are the ones already on the table: Chicago's staff allows 1.48 home runs per nine, and Cincinnati has hit 203 home runs this season. Neither number alone tells you who wins on Sunday. Together, they explain why a favorite that looks solid on the strength of one starter's recent form still comes with real risk attached, risk big enough that -164 didn't clear our threshold for a bet.

Lowder's August 28 line against this same lineup is the strongest piece of concrete evidence in either direction here, and it points toward Chicago. But one clean start from an opposing pitcher doesn't cancel out a season-long home run problem on the other side of the field. That tension is exactly why this stays a research note instead of a pick.

The verdict

Cubs are -164 favorites Sunday at 1:40 PM ET, and the model leans their way on the strength of Lowder's repeat matchup history against this lineup. But between Chicago's 1.48 home runs allowed per nine and 28 blown saves on the year against a Cincinnati lineup that's hit 203 homers, this one didn't clear the bar for an actual bet. It's a PASS: no stake, no official action, just a matchup worth watching play out.