Gronk saves all his NFL money, lives off endorsements - NBC Sports
Here's to hoping that Rob Gronkowski's retirement is brief
NFL icon Rob Gronkowski opens up on working with Tom Brady again after retirement - Mirror Online
The good, the bad and the goofy: A primer on Rob Gronkowski
Rob Gronkowski: Four-time Super Bowl winner announces NFL retirement, Sport
Tom Brady and Rob Gronkowski: Is a 2020 reunion with Patriots in the cards?
TE Rob Gronkowski re-signs with Buccaneers
Rob Gronkowski wants a trash talk rating for 'Madden' video game
Matthew Judon's situation at Patriots camp isn't sitting well with Rob Gronkowski and Rob Ninkovich - The Boston Globe
Growing Up Gronk: A Family's Story of Raising Champions: Gronkowski, Gordon: : Books