White Sox run differential shows that 2026 success isn't driven by luck

The White Sox have been surprisingly able to tread water despite an overtaxed pitching staff as of late. Their arms have blown a handful of games in disastrous fashion, and it's left some fans wondering if the White Sox 2026 magic is gone. Even when they perform well, the games seem tighter than they were earlier in the season. With that in mind, I think it's time to talk about the Pythagorean Theorem of Baseball.

It's a formula developed by Bill James, which basically argues that comparing runs scored to runs allowed is the best way to predict a team's success. It's obviously not perfect, but it's proven to be a fairly reliable way to predict a team's season-long win-loss record. According to Baseball reference, it's usually accurate within 3 games, aside from some outliers. Over the course of a 162-game season, there are bound to be some lucky wins and unlucky losses, so this theory attempts to predict a team's record based on run differential.

The good news is that the White Sox have actually underperformed their Pythagorean expected wins. Even with all their pitching problems, and even with some really bad, high-scoring games behind them, they're actually still unlucky compared to what their record should be.

It's a small difference; they've scored 655 runs and allowed 614, and they enter Wednesday with a 73-65 W-L record. Based on their run differential, their Pythagorean formula says they should have a 74-64 record. So they're behind by one win, something that could change after an unusually good-or-bad couple days.

The exact figure isn't that important, and I'm not going to insist they're a truly "unlucky" team that should be doing even better. But I do think it's important that, when you compare the runs they've scored with the runs they've allowed, they have been competitive, or better, all season. And based on their run differential, it appears to be sustainable.

The White Sox run differential is starting to slip, but all hope is not lost

Their pitching staff has been particularly troublesome lately, but they've had holes in their rotation (and their bullpen) all year. They've made up for this with an electric offense that hits for power and is among the American League leaders in most offensive categories.

Keeping that up will be the key to the White Sox maintaining their success down the stretch. The team finished with a 14-14 record in August, but they allowed 140 runs while scoring 133, so the Pythagorean wins are working against them recently. That shows how important run differential really is--the Sox played .500 ball this month, and that's been basically true for them all season. They have had a good year, but aside from their excellent month in May (18-10), they haven't won that much more than they've lost.

Baseball depends on margins. A lucky play here or there--or just the way the wind catches the ball--can change a game's overall outcome. What matters is consistently competitive baseball. If you score a lot, and you don't hand out runs to your opposition, things will settle in your favor. But if you play sloppy ball, it'll punish you eventually.

That being said, a 133-140 run differential isn't too far to come back from. The Sox could easily have a stronger September, with both a positive win/loss record and favorable differential. The pitching staff is what it is, so a lot of the pressure will be on the offense to come through.

It seems obvious to say the White Sox will do well if the hitters keep hitting, and if the pitchers don't allow too much damage. The White Sox have proven that they're a winning team; now they just have to keep it up a little longer.

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