Slumpbuster

"Shields is the guy the Rays count on as the slumpbuster instead of Kazmir because he'll do whatever the team needs on that particular day."

"When one is looking for a slumpbuster, a hog, or “road beef” (as Canseco puts it), he seeks out, as Grace mentioned, the “fattest gnarliest chick you can uncover” in order to try to break out of a slump.