We computed expected wins for all 30 MLB clubs — the team with zero run differential has 77 wins

We ran the MLB's own expected-win formula through all 30 clubs so you didn't have to — and one of the table's starkest splits between run margin and standing sits inside the AL East, where Tampa leads New York by 4 games despite trailing the Yankees by 70 runs in run margin. The formula, called xWinLoss, estimates how many games each club should win based on run-scoring context ^mmodeled. Apply it to the full 2026 standings through September 7 and two clubs are winning 8-9 games ahead of what the math says, while two others are losing 10-12 more than expected ^mmodeled. Tampa Bay (85-58) leads the AL East with a run differential of +47. The formula puts them at 76-67 — 9 games behind their actual record ^mmodeled. The Yankees trail by 4 games despite a run differential of +117: the formula pegs New York at 84-59 ^mmodeled, and they sit at 81-62, 3 games short of that expectation ^mmodeled. The gap in run differentials between the two clubs is 70 runs; the gap in the standings is 4 games, and it runs the other way. Two other cases frame the full range. The Cincinnati Reds (69-75) have allowed 108 more runs than they've scored and should be 61-83 by the formula — 8 wins below their actual record ^mmodeled. Their one-run record is 24-14 (.632). The Los Angeles Angels (54-90) are one of the worst teams in baseball by run margin (-80), and they're losing 10 more games than even that bleak projection — the formula predicts 64-80, and they've won 10 fewer ^mmodeled. Arizona (77-68) occupies a category of its own: the Diamondbacks have scored 641 runs and allowed 641 exactly, a run differential of zero, and have still won 4 more games than a break-even scoring record should produce ^mmodeled. Across all 30 clubs, 12 have outperformed the formula and 14 have fallen short; 4 are exactly at their projected win total ^mmodeled. The range runs from Tampa's +9 surplus to Detroit's -12 ^mmodeled, with the Braves, Brewers, and Dodgers — each with run differentials of +119, +169, and +155 — clustered within 1 win of their expected totals ^mmodeled.

The following is analysis, not fact. Most of the biggest overperformers carry winning records in one-run games — Tampa at 21-14 (.600), Cincinnati 24-14 (.632), Philadelphia 25-13 (.658), the Rangers 22-14 (.611), and Arizona 27-19 (.587) — though the tendency is not universal, as the exceptions below show. The four teams with deficits of 5 or more — Detroit, the Angels, Washington, and San Francisco — all have one-run records at or below .400: 14-26 (.350), 16-26 (.381), 14-21 (.400), and 13-25 (.342). The pattern is consistent with close-game performance accounting for much of the formula gap ^sspeculative. A team that wins one-run games accumulates wins without proportional run margin — every 1-0 result counts the same in the standings as a 10-0 blowout, but contributes almost nothing to the run differential total. A team that loses one-run games sheds wins without the margin deteriorating to match. Eight of the nine biggest overperformers and underperformers combined follow the same direction in their one-run records ^mmodeled. The Yankees case is particularly specific. Their one-run record is 17-21 (.447), losing more close games than they win, while Tampa is 21-14 (.600); both clubs have played roughly 35-38 one-run games. On run differential the formula orders New York ahead of Tampa by 8 games (expected 84-59 to 76-67); in the actual standings Tampa leads by 4 (85-58 to 81-62) — a 12-game reversal in relative position ^mmodeled. That swing runs in the same direction as their opposite one-run records, consistent with close-game performance driving most of it ^sspeculative.

The correlation is not universal. Houston is 5 games above expectations yet 13-15 in one-run games — the inverse of the pattern — which suggests overperformance can come from sources the one-run record alone doesn't capture ^sspeculative. Pittsburgh is 4 below expectations with a 24-17 one-run record; their gap and their close-game record point in opposite directions. Atlanta is the clearest limit case for the entire frame: the Braves are 85-59 with a +119 run differential, and their expected record is precisely 85-59. When the underlying dominance is that consistent, the formula doesn't need close games to explain anything — and the standings confirm it. Across the table, the divergence between expected and actual tends to compress as run differential grows, with the outliers concentrated in the middle of the standings rather than at the extremes ^mmodeled.