7 Wrestlers who have fought serious health issues.

#3 Dwayne "The Rock" Johnson

Dwayne "The Rock" Johnson has conquered both the Squared Circle and Hollywood--and one other, invisible foe.

The medical condition he has struggled with: Depression--a mental disorder in which the victim suffers great despondency and feelings of helplessness, often in spite of doing well in their lives.

Dwayne "The Rock" Johnson has conquered many foes in the ring. From Stone Cold Steve Austin to Triple H and the Big Show, The Rock laid the smack down on pretty much everyone of note from the Attitude Era.

His larger-than-life character soon earned him attention from the mainstream media. After appearing briefly in the Mummy Returns film alongside Brenden Fraser, The Rock was cast in his own starring role as The Scorpion King. From there he has gone on to become the most highly paid male movie star in the entire world.

Despite his success, The Rock has revealed that he has had to struggle against depression. Lingering trauma from his mother's failed suicide attempt and his divorce from a longtime school sweetheart were the impetus, but once depression takes hold it can be insidious and difficult to shake. Fortunately, The Rock is currently winning the fight against his mental demons.