Triplett attended the University of Minnesota, where he initially was a special teams force and eventually worked his way into a dominant linebacker.
In his senior season, in the first game of the year, he had possibly a game-saving interception, when vs Syracuse University in overtime he intercepted a pass in the Gophers own end zone to end the possession and give the Gophers the ball.
The next week vs United States Air Force Academy, with about 12 minutes left in the game, he recovered a fumble and returned it 52 yards for a touchdown, to break the 10–10 tie.
[4] On December 1, 2010, the Indianapolis Colts signed the free agent rookie to their active roster.
On July 29, 2012, the Tampa Bay Buccaneers signed Triplett, after releasing Dezmon Briscoe two days earlier.