The Vikings have signed long snapper Cullen Loeffler to a three-year extension. Loeffler has spent his eight-year career with the Vikings. He was signed as a rookie free agent in 2004. Vikings punter Chris Kluwe, kicker Ryan Longwell and Loeffler have played together in Minnesota for the past six years. That's the longest tenure for any kicking trio in the league, according to STATS LLC.