Chicago Cubs Turn to Shota Imanaga to Cool Off Pittsburgh Pirates
Earl's model says the Chicago Cubs win this game — and that the smart money doesn't touch the moneyline with a ten-foot pole.
That's the central tension in Friday's Wrigley Field matinee, and it's exactly the kind of spot where casual bettors and professional handicappers walk away with very different tickets. The Cubs are 81-66, they're at home, they're a legitimate playoff team, and the market has hammered them from -184 to -198 since opening. Our model projects a final of Cubs 4.4, Pirates 4.1 — a margin of 0.37 runs. That gap between a real win probability and a -198 price tag is where this entire handicap lives.
The Line Says One Thing, the Numbers Say Another
Let's start with the market's own language. The spread opened at -1.5 and hasn't budged. The total opened at 8.5 and hasn't budged. Meanwhile the Cubs have been bet from -184 to -198 while Pittsburgh drifted from +154 to +166. So the public is loading up on the home favorite on the moneyline, and the books are happily taking it — because the run line and the total, the two markets that actually require a detailed read, are frozen.
That's a classic tell. When a favorite gets steamed on the ML but the run line holds firm, the market is telling you it believes in the win, not the margin. Our model agrees, and it's quantifying the disagreement:
| Market | Earl's Model Pick | Expected Value |
|---|---|---|
| Run Line | PIT +1.5 | +13.02 |
| Over/Under | Over 8.5 | +6.73 |
| Moneyline | CHC | -14.63 |
The run line is the strongest number on this board by a wide margin. The moneyline is the weakest — and it's the one the public is pounding.
Imanaga: A Stabilized Season With a Live Ball Problem
Shota Imanaga's surface line reads like a solid mid-rotation starter: 9-10, 3.91 ERA, 1.12 WHIP across 28 starts and 156.1 innings. His command is genuinely excellent — 35 walks, a 2.01 BB/9, and a 4.34 strikeout-to-walk ratio. He doesn't beat himself.
But dig one layer down and there's a real problem for the Cubs in this specific ballpark:
| Pitcher | Record | ERA | WHIP | K/9 | BB/9 | HR |
|---|---|---|---|---|---|---|
| Shota Imanaga (L) | 9-10 | 3.91 | 1.12 | 8.75 | 2.01 | 33 |
| Wilber Dotel (R) | 1-4 | 4.41 | 1.32 | 9.37 | 3.86 | 2 |
33 home runs in 156.1 innings works out to roughly 1.9 per nine — that's a home run rate that gets punished at Wrigley, where the park factor for home runs sits at 105 and both the left field (350 ft) and right field (353 ft) corners are among the shortest in the National League. The overall park factor of 102 is mildly hitter-friendly, and on a September afternoon with the roof open and no weather concerns flagged, the ball carries.
This is the single most important structural fact in the game: the Cubs' starting pitcher gives up the one thing this ballpark rewards most, and he's facing a Pittsburgh lineup coming off a sweep at the White Sox that pushed them above .500. The Pirates have scored 4.82 runs per game this season against a 4.44 team mark for Chicago — the gap is smaller than the records suggest.
The Dotel Question Is a Bullpen Question
Pittsburgh is listing Wilber Dotel, a rookie right-hander with a 1-4 record and 4.41 ERA — but look closely: zero games started in 32.2 innings of work. That means Friday is either an opener situation or a full bullpen game.
There's real swing-and-miss here — 9.37 strikeouts per nine — and Dotel has kept the ball in the park, surrendering just 2 home runs. But the 3.86 BB/9 and 2.43 K/BB ratio tell you he's not efficient, and a pitcher who has never been asked to record outs in bulk isn't going to give Pittsburgh five or six innings. Against a Cubs offense averaging 5.31 runs per game, that means Pirates manager gets an early hook and an extended look at his middle relief.
And here's the flip side of that coin, which is precisely why the run line is a better play than the moneyline: even if Chicago piles up runs late against Pittsburgh's bullpen, the Pirates can lose this game 6-4 or 7-5 and still cash a +1.5 ticket. The Cubs' own bullpen problems make a close game far more likely than a blowout.
The Cubs' Bullpen Is the Story Nobody's Pricing
Chicago's injury report is a catastrophe on the pitching side. Read the list: Justin Steele, Hunter Harvey, Porter Hodge, Shelby Miller, Ben Brown, Cade Horton, Phil Maton, Gavin Hollowell, Ethan Roberts, Riley Martin, Edward Cabrera — all pitchers, all injured, most on the 60-day list. That is not a depth problem. That is a structural collapse of the relief corps, and it's been visible in how the Cubs have stumbled toward the postseason rather than surged into it.
Our own reporting flagged the Chicago bullpen as a genuine October liability, and the staff running out of gas down the stretch is a live concern. When Imanaga exits — likely around the sixth — the Cubs will be asking a heavily depleted group to protect a lead in a game the model only projects them to win by 0.37 runs.
There's a second, quieter injury issue: Dansby Swanson is on the 10-day IL. The Cubs are without their shortstop, which matters both for run prevention and for lineup depth. Tyler Austin remains on the 60-day list at first base.
Pittsburgh, for its part, is missing Ryan O'Hearn (10-day), catcher Endy Rodríguez (60-day), and pitchers Mitch Keller, Braxton Ashcraft, Kirby Yates, and Isaac Mattson. The Pirates are hurting too — but their injuries haven't gutted a single unit the way Chicago's have gutted the bullpen.
Why the Total Has Value — Just Not Much
The Over 8.5 carries an expected value of +6.73, a legitimate but secondary edge. The case is straightforward: Imanaga's home run rate, Wrigley's 105 home run park factor, a Pirates bullpen game, and a Cubs offense scoring 5.31 per night.
The caveat is that the model's own projection lands at exactly 8.5 total runs. There's no cushion. You're paying a fair number and collecting on the model's slight lean. Treat it as a smaller stake than the run line, and understand that a bullpen game can just as easily produce a slog as a slugfest if Pittsburgh's relief arms show up.
The Live Narrative Angle
Keep Pete Crow-Armstrong on your radar all afternoon. He's closing in on a 40/40 season, and that chase changes how he plays — aggressive on the bases, hunting pitches. In a park with a 105 home run factor and a short right field porch, that's a live prop angle and a reason the Cubs' run total can spike in a single swing. It's the kind of thing that shows up in the box score ten minutes after you've already decided your position.
The Ticket
- Primary play: Pittsburgh Pirates +1.5. The model's 0.37-run projected margin is less than a quarter of the 1.5-run threshold, and the EV is the highest on the board at +13.02. A depleted Cubs bullpen and a Pirates offense that just swept the White Sox in this city give you two independent paths to a one-run game or better.
- Secondary play: Over 8.5. Smaller stake. The Imanaga home run rate and the Wrigley home run park factor carry the case, with a bullpen game for Pittsburgh as the kicker.
- Moneyline: pass. Our model technically favors Chicago, but at -198 the price is wrong — the -14.63 EV is the model explicitly telling you the market has overpaid for the favorite. If you want Chicago in this game, take them straight at your own risk; the professionals aren't.
The public sees 81-66 versus 74-73 and buys the favorite. The edge is in the margin, not the winner — and that's where the money is on Friday afternoon at Wrigley.