Update: according to several reports, this is not official. Tom Brady has informed Bucs GM Jason Licht that he has not made a decision yet…
Despite reports, Tom Brady hasn't made up mind, Football
Live updates: Tom Brady retirement from the NFL
Tom Brady announces retirement after 22 NFL seasons, 7 Super Bowl titles
Tom Brady Retires as Buccaneers QB: Report
ESPN refutes its own Adam Schefter report about Tom Brady retiring
Buccaneers QB Tom Brady planning to retire from NFL after 22 seasons
ESPN still not retracting Brady article : r/nfl
Conflicting reports swirl about Tom Brady's future in football
Questions mount about whether Tom Brady is retiring from the NFL : NPR
Buccaneers QB Tom Brady To Retire
Tom Brady Announces NFL Retirement After Iconic 22-Season Career with Patriots, Bucs, News, Scores, Highlights, Stats, and Rumors
AP sources: Despite reports, Tom Brady hasn't made up mind on retirement, yet to inform Buccaneers of decision
Report: Tom Brady Retiring From NFL After 22 Seasons, Bucs Not Informed
Report: Tom Brady has not told Bruce Arians he is retiring - Sports Illustrated