Rob Gronkowski said he received calls from teams to play this season, but his 'mindset' wasn't there
Rob Gronkowski Announces 2nd Retirement From NFL
Rob Gronkowski Announces Retirement From The NFL – Hollywood Life
Rob Gronkowski announces his NFL retirement, but his agent not convinced
Rob Gronkowski Could Be the Buccaneers' X Factor - The Ringer
NFL World Reacts To Rob Gronkowski Decision News - The Spun: What's Trending In The Sports World Today
Rob Gronkowski 'not ready to commit' to decision on football future yet
Rob Gronkowski sounds unsure about NFL future, won't commit to playing in 2018
Rob Gronkowski announces retirement
Super Bowl winner Rob Gronkowski retires from the NFL