#2 Brock Lesnar (WWE Debut in 2002)
One of the most decorated superstars in WWE history, the 8-time World Champion Brock Lesnar hasn't missed a lot of in-ring time due to injuries during his two stints in the promotion. While he suffered a nasty-looking neck bump in the main event of Wrestlemania 19, he luckily recovered soon enough from the concussion.
Returning to the company after eight years in 2012, The Beast Incarnate has gone on to have a great second stint with no injuries putting him out of action. Though he had decidedly taken a slower approach by wrestling infrequently, his in-ring style is just as vicious as before.
It's not that he hasn't been injured all his life, though. He did suffer a few injuries during his time in the UFC, which ultimately cut short his career in MMA. But, his time in WWE has been safe with close to no medical history. He continues to perform at the same level and his return is being highly anticipated by all his fans.