Second chances are a wonderful thing. Whether it’s with that smokin’ hot girlfriend that you let get away before you realized she was way out of your league, or retaking your driver’s license test to prove you can parallel park better than a Mojito-soaked Paris Hilton, we’ve probably all had second chances in life that we’re thankful for.

In Ken Wagan’s case — an emergency room nurse during the week and a wrench-spinning,...