In the first 2 months of the season, Chone Figgins batted .160 In these past 2 months of the season, Chone Figgins has batted .420 I emplore anyone to find a bigger discrepancy than that over that kind of time span.
Can't think of one over the course of one season, but Sandy Koufax's career was like that. First 7 seasons 3.96 ERA, avg record 8-8, avg 136 K per year Next 5 seasons 1.98 ERA, avg record 22-7, avg 288 K per year