Sport and superstition seem to go hand in hand. It's not unusual for someone to have a favorite number or lucky pair of gym socks... but professional athletes tend to take things to the next level. Lest we forget Jason Giambi’s confession that he wears a gold thong for good luck (apologies for the mental image).
Also on Extra Mustard: Who said it -- Justin Bieber or Johnny Manziel?
In this spirit, I created a quiz to test your knowledge of weird and wacky sports superstitions: