In his senior year, he led Nevada Union High to a 12-1 record and a trip to the city title game.
Havner missed the Pioneer PureVision Las Vegas Bowl after having arthroscopic knee surgery, but, in 11 games, he accounted for 125 tackles, 1 sack and 2 interceptions.
Havner led UCLA to a 10-2 record with a win in the 2005 Sun Bowl versus Northwestern, where he made 7 tackles and had 1 interception in a 50-38 victory.
Havner went undrafted in the 2006 NFL draft and was signed by the Washington Redskins and was assigned jersey number 51.
During the 2009 offseason, Havner attempted to make the transition from linebacker to tight end, which was successful as he made the 2009 opening roster.
Against the Cleveland Browns on October 25, 2009, Havner scored his first career touchdown on a 45-yard reception from Aaron Rodgers.