5 times pro wrestling champions had to vacate their title.

#2. John Cena

He's the face that runs the place, the measuring stick, the Doctor of Thuganomics and the (former) champ. He's John Cena, and while his reputation in the ring was something akin to superhuman, he once displayed an all too mortal frailty.

Cena had become the no questions asked 'top guy' in WWE by 2007, having superseded fellow journeymen talents Randy Orton and Batista. He was enjoying a face run and had largely discarded his 'rapper' gimmick that earned so much enmity in the early days of his career.

Much attention is paid to the huge, splashy bumps that cause injury to stars, such as New Jack throwing Vic Grimes off the roof of an arena or Mankind plunging through the cage at Hell in a Cell. However, more mundane moves can be just as dangerous, and so it was that John Cena tore a pectoral muscle attempting to hip toss Mr. Kennedy.

Cena was stripped of his title by Vince McMahon, and spent months in recovery only to return well in advance at the Royal Rumble.