The Undertaker has been wrestling for thirty years. That's a lot of miles on the clock. The Undertaker's injury woes are well-documented. He's had to take substantial time off in the past to convalesce and heal up. In the late 90s, when 'Taker was struggling with back, knee and groin trouble, many insiders were predicting he was on the verge of retirement. When The Undertaker came back in 2004 (after a few months off to deal with yet more injury woes) he didn't slow down. Instead, he started to push himself even harder in the ring. His workrate improved as his character evolved. The fact that he was having the matches he did with the likes of Kurt Angle, Shawn Michaels and Randy Orton in the mid-2000s is incredible considering the pain he must have been in. When Undertaker finally does say goodbye to in-ring competition, he should sit back and put his feet up a little. No more bumps. His knackered body needs some serious time to heal. While The Undertaker will no doubt experience pain every day for the rest of his life, he should try everything possible to alleviate the symptoms.