Four-time Super Bowl champion Rob Gronkowski announces retirement after 11 seasons with Patriots, Buccaneers
NFL: Rob Gronkowski leaves door open for possible Patriots return
Why retired NFL star Rob Gronkowski never spent his NFL salary
Holding out hope that Rob Gronkowski's retirement is brief - The Boston Globe
Gronk says he's 'all in right now' after report that he'll consider retirement - The Boston Globe
Patriots' Gronkowski non-committal on 2018 return
Former Patriots TE Rob Gronkowski announces retirement for 2nd time
Rob Gronkowski Was Notoriously Thrifty Despite His NFL Paycheck
New England Patriots tight end Rob Gronkowski announces retirement
Patriots tight end Rob Gronkowski announces retirement