Four-time Super Bowl champion Rob Gronkowski retires from NFL for second time, NFL
Rob Gronkowski retires for second time following decorated 11-year career with Patriots, Buccaneers
All-Pro tight end Rob Gronkowski retires again - The Japan Times
BREAKING: Rob Gronkowski Retires from Football
Ex-Arizona star Rob Gronkowski re-signs with Buccaneers, per report - Arizona Desert Swarm
Rob Gronkowski Intends To Retire
Buccaneers tight end Rob Gronkowski retires for second time
NFL: Over and out as Gronkowski retires for second time
Rob Gronkowski retires, won't join Tom Brady for 3rd season in Tampa Bay
In year two out of retirement, Rob Gronkowski ready to go “full speed” - Bucs Nation
Rob Gronkowski agrees to come out of retirement to play in Tampa Bay with Tom Brady