SLINGER, Wisconsin (WDJT) -- He's known as the 'World's Oldest Teenager,' he's been a fixture on Wisconsin racetracks for more than six decades, and at 83-years-old, he still gets revved-up on race day. "Can't believe I've been at it this long." said Jerry Eckhardt from his home and workshop in Johnson Creek. I don't have any interest in ballgames or golfing or anything else. So, I just kept on racing." 83-year-old Eckhardt is a living legend on racetracks around Wisconsin.