I think Schilling's got a great chance. His body of work puts him in the conversation, and then he's got a couple moments of postseason greatness to give him some Mazeroski points.
Not just the Bloody Sock either, although that's the big one. His last professional game being a World Series win doesn't hurt either, not to mention his penultimate game being an elimination game against Cleveland that he also won. Contributing in a major way to the postseason campaigns of the 2001 Diamondbacks, 2004 Sox and 2007 Sox all count well in his favor.
Pettitte may get some postseason points as well, but I just don't think Pettitte has anything in his history that matches the individual heroism of the Bloody Sock Game