Play him as a fielder AND a closer.
I don't recall too many cases where these unique, multi-talented players really pan out at more than one position. There was a unique pitcher out there a few years ago who was supposed to change face of baseball, too. He got a specially-designed glove with six fingers and two webbings approved by Major League Baseball, and he could pitch with either arm. MLB had to come up with a new set of rules for him, and it was really strange to see him on the mound against a switch-hitter. LOL.