Cardinals vs Pirates Preview: Two NL Central Clubs Searching for Footing
Earl's model says the strongest play on this card is Pittsburgh on the moneyline, with value on the over 7.5 and St. Louis plus the run line as a mid-game insurance backstop. The projection is essentially a coin flip — 4.2 runs apiece, a margin of -0.02 runs — but as any sharp handicapper knows, a pick'em game is rarely a true 50/50 proposition. When the model's expected value on the Pirates sits at +6.69, it's signaling that the market hasn't fully priced in the gap between what these two pitching profiles actually are and what their records suggest.
Let's dig into why.
Two Starters, Two Very Different Levels of Concern
| Pitcher | Record | ERA | WHIP | K/9 | BB/9 | H/9 |
|---|---|---|---|---|---|---|
| Quinn Mathews (L) | 0-2 | 6.43 | 1.79 | 8.36 | 4.50 | 11.57 |
| Jared Jones (R) | 2-5 | 4.76 | 1.25 | 10.19 | 3.44 | 7.81 |
The surface records say both lefties... well, both starters are struggling. The underlying data says these are two completely different problem sets.
Quinn Mathews has thrown 14 innings at the major league level and allowed 18 hits and 7 walks. That's a 1.79 WHIP — nearly two baserunners per inning. His 11.57 H/9 and 4.50 BB/9 aren't the numbers of a guy who is one adjustment away from figuring it out; they're the numbers of a pitcher who is consistently falling behind, leaving pitches over the plate, and paying for it. In his three starts, opponents have scored 12, 1, and 5 runs against the Cardinals. The one "good" start — a 2-1 win over Cincinnati — looks more like an outcome the defense and bullpen manufactured than a performance Mathews generated.
Jared Jones is a different animal. The 2-5 record and 4.76 ERA are ugly, but the peripherals tell a far more encouraging story. A 1.25 WHIP. A 2.96 K/BB ratio. 77 strikeouts in 68 innings (10.19 K/9). He's allowing hits at a rate nearly four hits per nine lower than Mathews. His one real vulnerability is the long ball — 11 home runs in 68 innings, a 1.46 HR/9 — and Busch Stadium's park factor does sit at 102 for home runs, so the fly-ball risk is real. But a pitcher with Jones's control profile is a much safer bet to limit damage than a pitcher who is putting nearly two men on base per inning.
The Run-Support Anomaly
Here's the number that most casual bettors will miss: In Jones's last five starts, the Pirates have scored 3, 0, 1, 2, and 0 runs. That's six runs in five games — 1.2 runs per start. This is a Pittsburgh offense that averages 4.87 runs per game on the season, the better scoring offense in this matchup by a full third of a run.
What does that mean going forward? Regression. The Pirates' bats have gone silent at the worst possible times behind a starting pitcher who is giving them quality innings. When a team's season-long run production is over four-and-a-half runs per game and they've scored six total runs in their starter's last five outings, the law of averages suggests a correction is coming. And what better night for that correction than a matchup against a pitcher packing an 11.57 H/9?
The Cardinals' offense, by contrast, is perfectly average at 4.44 runs per game. They're not a team that's going to consistently hang crooked numbers on a starter like Jones, who has shown he can miss bats at an elite rate.
The Run-Differential Contradiction
This is where Earl's model earns its keep. Pittsburgh enters Friday with a +24 run differential and a 65-70 record. St. Louis sits at -13 run differential with a 67-68 record. That's a 37-run swing in favor of the team with two fewer wins.
Run differential is a far more stable predictor of future performance than win-loss record. It measures what a team has actually done on the field, not the sequencing of wins and losses. The Pirates have outscored opponents by 24 runs this season yet sit below .500 — a classic underachievement profile. The Cardinals have been outscored by 13 runs yet still sit below .500 at 67-68. That's a team that has overperformed its true talent.
Over a 162-game season, those regressions tend to even out. The model's near-zero projected margin despite the market's slight lean toward Pittsburgh reflects exactly this — both teams' underlying profiles, once you strip away the narrative noise, are far more evenly matched than the records suggest. But even a coin flip is a bet worth making when you're getting the better pitcher at a reasonable price.
Line Movement: The Market Agrees
The betting market has quietly validated the model's lean. St. Louis opened as -102 home favorites. The number has since flipped to Pittsburgh -112, with the Cardinals now a +104 home dog. A road team flipping from underdog to favorite is typically a signal of sharp money entering on the visitor.
Meanwhile, the total has been dragged down from 8.0 to 7.5. The market's instinct to shade the total down might be a reaction to the two starting pitchers' recent struggles, but Earl's model projects 8.37 combined runs — nearly a full run above the current line. Given Mathews's 11.57 H/9 and Jones's HR vulnerability in a park that boosts home runs by 2%, the over at 7.5 presents a legitimate value spot.
The Injury Factor and The Public's Blind Spot
Both rosters are banged up, but the injury composition matters more than the count. St. Louis is missing shortstop Masyn Winn on the 10-day IL, stripping the middle of their infield just as their rookie starter needs defensive help behind him. The Cardinals also have four arms — Strzelecki, Pallante, Dobbins, and Rajcic — on the shelf, leaving a taxed bullpen with limited options if Mathews exits early.
Pittsburgh is without catcher Endy Rodríguez and the 60-day arm of Mitch Keller, but Keller isn't the starter tonight. Jones is, and Jones's profile is the better of the two.
The public, meanwhile, will gravitate toward the Cardinals. They're at home, they have the better record, and they're coming off an embarrassing loss to the Orioles that creates a "bounce-back" narrative. The public also sees Jones's 0-5 recent stretch and fades him. But that's precisely the trap. Jones's recent results are a function of a dormant offense, not poor pitching. The public is betting on narratives; the model is betting on the underlying metrics — the Pirates' +24 run differential, Jones's elite K/9, and a Cardinals starter who has been hit at an alarming rate.
The Card
So how do we play this one?
- Pittsburgh moneyline (-112) — the model's strongest edge at +6.69 EV. The Pirates are the better underlying team, they have the better starting pitcher, and they're getting a price that reflects a false coin flip.
- Over 7.5 runs — Earl's model projects 8.37. Mathews's inability to miss bats or limit walks, combined with Jones's home-run vulnerability, gives us two paths to the over even in a neutral park.
- St. Louis +1.5 — if you prefer a safety net, the model's run line side is the Cardinals at +1.5. With a projected margin of essentially zero, taking the extra run offers a comfortable backstop for anyone worried about a one-run game. It's a hedge, not the primary angle — the real value sits with Pittsburgh on the moneyline.
This is a game where the public's eyes will be on the wrong numbers. They'll see the Pirates' 65-70 record, Jones's winless run, and the Cardinals' home-field bounce-back narrative. Earl's model sees a +24 run differential, a 10.19 K/9 starter facing a 6.43 ERA counterpart, and a market that only partially adjusted to the truth. When the model's biggest edge and the sharp-money direction align, that's a card worth playing.