Question: The Curse of Rocky Colavito is one of several sports superstitions centered on the failure to win a championship in any major league sport for how many years?
Sentence (from "Cleveland sports curse"): Combined with the short-lived Barons franchise of the National Hockey League (NHL), Cleveland teams endured an unprecedented 147-season championship drought, having not won a title since the Browns defeated the Baltimore Colts in the 1964 NFL Championship Game two seasons prior to the first Super Bowl.
Relevant evidence: No