Rob Gronkowski retirement: 5 fast facts about the tight end’s stellar career Unknown 00:15 The 29-year-old tight end announced his retirement Sunday on Instagram. Share this Share on FacebookTweet on TwitterPlus on Google+ Related PostsDubnyk, Wild blank Flames 3-0Garoppolo must deal with Seattle crowd noise for 1st timeBrown, Carter carry Seattle past Long Beach State 79-57Bills praise Alexander, who could be playing final home gameWild Breakaway: Minnesota bounces back in a big wayOffensive line dance: Broncos shuffling around linemen
