Bottom line: Five teams across MLB, La Liga, and the Bundesliga are being punished by finishing variance far beyond what their underlying numbers earned.
As of October 12, 2026, the Detroit Tigers, San Francisco Giants, New York Mets, Valencia, and Borussia Mönchengladbach share one common humiliation: each played well enough, by the math, to be in a materially different position than the one they actually occupy. Our weekly cross-sport Luck Index, which synthesizes Pythagorean expectation, expected points, and expected goals data into a single composite score, flags all five as extreme negative outliers. These aren't hypothetical hard-luck cases. The gaps are large, specific, and verifiable.
1. Detroit Tigers - MLB
The Tigers finished 76-86. According to their Pythagorean win-loss record, per Baseball Savant run-differential data, they should have won approximately 89 games. That 13-win gap is the largest negative deviation in the American League this season and one of the widest in recent MLB history. A Luck Index of -58 reflects a team that did nearly everything right except convert performance into standings.
Detroit's problem was almost entirely concentrated in close games. Their record in one-run contests was brutal, a coin-flip category where skill explains far less than most fans assume. In a parallel universe governed by regression, the Tigers are a playoff team. In this one, they watched October from home.
Thirteen wins is not a rounding error. It is the difference between a wild-card berth and a front-office meeting about the future.
2. San Francisco Giants - MLB
San Francisco went 65-97, a record that looks like a teardown roster. Their Pythagorean expectation says otherwise: roughly 72 wins, a seven-game gap that earns a Luck Index of -55. The Giants were bad. They were not 97-loss bad.
The distinction matters for how we evaluate their roster going into the offseason. Run differential painted a team closer to the low-70s, mediocre but not historically futile. Per Statcast, the Giants' offense posted expected batting metrics that aligned more closely with a middle-of-the-pack lineup than a basement dweller. The losses piled up in sequences that the underlying numbers never supported.
Anyone scanning MLB luck rankings this fall should note: San Francisco's seven-win gap is the third-largest negative deviation in the National League.
3. New York Mets - MLB
The Mets finished 74-88 against a Pythagorean expectation of roughly 78 wins, a four-win gap that produced a Luck Index of -50. Smaller than Detroit's chasm, but significant in a National League race where four games separated the last playoff spot from the couch.
New York's run differential told the story of a flawed but competitive team. Their actual record told the story of a disappointing one. The gap, modest in isolation, lands differently when you realize how thin the margins were in October's bracket.
4. Valencia - La Liga
Shifting continents. Valencia sit on 5 points through eight La Liga matches (1W 2D 5L). According to FBref expected-points modeling, they should be on roughly 8.3 xPoints. A Luck Index of -28 reflects a side losing the expected goals luck battle early in the European season.
The 3.3-point gap is substantial at this stage. In a relegation fight, that is the difference between anxious and desperate. Valencia's underlying chance creation has been adequate, not elite, but the finishing variance has turned draws into defeats with painful regularity.
5. Borussia Mönchengladbach - Bundesliga
Gladbach have zero points from five Bundesliga matches. Their expected points total, per Understat data, is 4.6. A team generating nearly a point per game in expected value has collected none in actual value. Their Luck Index of -26 is the worst luckscore in the Bundesliga.
Zero points from 4.6 xPoints is the kind of start that tests a coaching staff's ability to keep a dressing room calm. The performances have not been as dire as the table suggests. The results have been exactly as dire as the table suggests.
The Common Thread
Across three leagues and two sports, the pattern is the same: finishing variance. Close games lost, expected goals unrewarded, run differentials betrayed by sequencing. None of these five teams were elite. But all five were better than their records, by margins large enough to change seasons. The math doesn't care about standings. Standings, unfortunately, don't care about the math.
