For professional athletes, having your name and/or face on a product is typically a good thing. That generally means you are endorsing a product and basically making more money. Sounds like a good thing right?
Yes, unless it is the cover of the latest version of Madden Football.
Athletes are a superstitious lot, and for the NFL the dreaded Madden curse is one of the worst superstitions there is. While it may sound silly, ever since EA Sports took John Madden off the cover starting with the 1999 edition of the game something has happened to all but one of the cover boys.