One year to the date after he first announced he was hanging up his cleats, the Tampa Bay Buccaneers QB confirmed on Wednesday that he is quitting "for good" after previously walking back his decision.

Across a career stretching 23 years, two teams, seven Super Bowl wins and five MVP awards, the 45-year-old has earned a reputation as one of the all-time greats, not just in gridiron but all sports.

His announcement has sparked an outpouring of affection and respect from his peers, with fellow quarterback star Mahomes leading the tributes to the "greatest".

The Kansas City Chiefs man posted three goat emojis to Twitter, in reference to the acronym GOAT - greatest of all-time.

Brady's Tampa Bay teammate Ryan Jensen, who won Super Bowl LV alongside him, penned a heartfelt message after he helped him through injury last season.

"Thanks for pushing me every day this season, mentally and physically, to get back on the field," he wrote.

"I'm glad I was able to take the field with you one last time! Enjoy retirement, don't dog me too much in the booth. Love ya man!"

"Greatest of All Time. No question, no debate," said three-time NFL defensive player of the year JJ Watt, who announced his retirement earlier this year. "It's been an honor and a privilege."

Praise for Brady was not limited to American football, with martial arts veteran Conor McGregor praising the player's Irish roots, while former New York Yankees shortstop Derek Jeter offered his congratulations on "an unbelievable career", adding: "It was fun to watch!"

England soccer captain Harry Kane chipped in on Twitter: "Congrats on an amazing career @TomBrady. See you on the golf course soon."

Brady spent the majority of his career with the New England Patriots, taking the team to six Super Bowl successes between 2000 and 2019.

He moved to the Buccaneers for the 2020 season, and inspired them to a surprise championship in his first campaign in Florida.

The Glazer family, owners of the Buccaneers, said: "Tom's impact on our franchise these past three years has been immense and we are appreciative of the time we had with him here in Tampa Bay.

"He set an exceptional standard that elevated our entire organisation to new heights and created some of the most iconic moments in our history. Tom's impact will be felt within our community for many years to come and we will be forever grateful for those unforgettable memories that he provided."

Australian Associated Press