J.R. Mannetta ’13 is not a super genius. Nor is he the kind of guy who goes around flaunting his broad grasp of esoteric facts. In fact, he’s pretty much a regular guy. A regular guy with impressive knowledge of wide-ranging arts, sports, and pop culture, who, with a healthy dose of perseverance, patience, and practice, made it to the big stage to compete on that bastion of television trivia, Jeopardy! The Boston native’s interest in trivia—and Jeopardy! in particular—began when he was in high school and continued through his college years at Wesleyan, where he competed in trivia contests…