Are there any studies that look at lead-lag relationships in Pythag WL % vs actual WL %? I havent seen any evidence that Pythag WL % has strong predictive value, but maybe I missed something. Just to be precise, the claim is that the Cubs won't necessarily start winning games at the rate indicated by their current pythag %; the pythag number could just as easily drop toward 42%, the current actual WL. No one said anything about "little chance". That's an interesting question. These are the teams last year that were 2 games or more off their Pythagorean projection after April. I am putting their actual winning percentage after April, their expected winning percentage, and then what their actual winning percentage at the end of the year was. Edit: I also am including the ending Pythagorean percentage per a request. Red Sox. Actual-.577, Pythag-.461, End-.530, endpyth-.500 Yankees. Actual-.541, Pythag-.667, End-.598, endpyth-.586 Atlanta. Actual-.440, Pythag-.520, End. .488, endpyth-.525 Washington. Actual-.308, Pythag-.423, End-.438, endpyth-.493 Florida. Actual-.261, Pythag-.435, End-.481, endpyth-.432 Cincy. Actual-.692, Pythag-.577, End-.493, endpyth-.469 Houston. Actual-.630, Pythag-.560, End-.506, endpyth-.512 Cubs. Actual.583, Pythag-.500, End-.407, endpyth-.432 Pirates. Actual-.257, Pythag-.333, End-.413, endpyth-.438 Rockies-Actual-.577, Pythag-.500, End-.469, endpyth-.500 San Fran-Actual-.520, Pythag-.440, End-.472, endpyth-.472 Los Angeles-Actual-.462, Pythag-.538, End-.543, endpyth-.537 The 2 AL teams finished closer to their actual percentage than their Pythagorean percentage. The NL teams? All 10 of them finished closer to their Pythagorean percentage at the end of April than their actual percentage, but for some of them neither one was very accurate. The Cubs mid-point would be .500-so from this one season data, it would seem to indicate that they are likely to be over .500 at the end of the year. From looking at the 2005 data quickly, it looks like a couple teams were closer to their actual, but most were again closer to their pythagorean numbers.