Patriots tight end Rob Gronkowski announced his retirement via Instagram on Sunday. Gronkowski won three Super Bowls and was a four-time All-Pro in nine seasons with New England.
"It all started at 20 years old on stage at the NFL draft when my dream came true, and now here I am about to turn 30 in a few months with a decision I feel is the biggest of my life so far. I will be retiring from the game of football today," Gronkowski wrote. "I am so grateful for the opportunity that Mr. Kraft and Coach Belichick gave to me when drafting my silliness in 2010.