- Rob Gronkowski threatened to retire after he almost got traded to the LionsSB Nation
- Rob Gronkowski threatened to retire if traded to Detroit Lions, per reportUSA TODAY
- Count the New England Patriots Out at Your Own Risk (Because It’s Fun!)Slate Magazine
- Rob Gronkowski confirms he considered retirement after trade talksESPN
- Patriots-Lions: Teacher vs. pupil with a serving of Josh GordonNew York Post