bullshit.
take a look at Mickey Mantle's, Di Maggio's ,Ted Williams, Pujol's stats during world series and playoff.
Glad you brought this up. First of all, poor choice picking Williams to make your point. Everyone who follows baseball knows he only got to the post season once, and stunk during it. But, we can still have fun with numbers - I will show you his line OBP/SLG/OPS for that series:
.333/.200/.533 Putrid. Especially when you compare it to his career average of an insanely good .482/.634/1.116 It's a great expample to show how baseball works - great players can stink in small samples, and poor players can appear to be heroes. As the sample size increases, players gravitate towards their norms, which Williams most certainly would have.
DiMaggio was another poor choice, since he posted a post season line of .338/.422/.760 w which are pretty much league average numbers and pale in comparison to his outstanding career norms of .398/.579/.977 It also include a horribles 2-18 performace in the 47 WS, as well as other poor WS.
Mantle fared better, with a very good .374/.535/.908. His OPS is still 69 points under his career average of .977
Puljos has played in the most postseason series out of the others (15) and, his totals are pretty much the same as......his career totals. See how it works as the sample increases?
ARod's postseason, again is .338/.496/.884 which includes the greatest three series performance in MLB hisotry. The whole chokey thing is a MYTH.
Great players will have great series, and great players will have horrible series. It's how baseball works.