Sport: Baseball
Team: New York Yankees
2013-14 salary: $29,000,000
Key stats: .274 BA, 34 HR, 119 RBI combined between 2011 and 2012 seasons (221 G)
Salary source

The most bloated contract of 2013, and really in the history of sports, has to go to A-Rod. This once-proud player who was considered to be among the best of all-time has become a laughingstock, not only putting his foot in his mouth via Twitter but also by managing to get himself involved in pretty much every steroids scandal afflicting baseball in the last decade. He's become such a sideshow that the Yankees (at least according to Rodriguez himself) are now actively trying to keep him off the field in hopes he'll be suspended.