Rob Gronkowski retires from NFL for second time
Rob Gronkowski retires: Measuring Gronk's greatness as star TE
Patriots star Rob Gronkowski retires from NFL after nine seasons
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Rob Gronkowski Makes Definitive Statement on NFL Future
Rob Gronkowski on retiring from NFL at age 29: 'I didn't even want
Legendary Patriots TE Rob Gronkowski announces his retirement
Ex-Patriots Star Gronk Announces Retirement From Football: 'I Gave
Ex-Patriots TE Rob Gronkowski to launch Super Bowl music festival