How old is pro wrestling legend Sting?

Sting (a/k/a Steve Borden) turns 55 today. He was born on March 20, 1959. He stated over the weekend during a Q&A session in the UK that he wants his final match to be against Undertaker.

Powell's POV: Sting has been advertised as appearing at WrestleCon on WrestleMania Sunday. In other words, he will be in New Orleans working a non-WWE event.