Tampa Bay Buccaneers quarterback Tom Brady announced his NFL retirement on Tuesday after an age-defying career during which he won a record seven Super Bowl championships and established himself as arguably the greatest player in the sport's history.

The 44-year-old Brady, known for his tenacity, intelligent playmaking abilities and remarkable leadership, spent 20 seasons with the New England Patriots where he won six Super Bowl titles and added another last year in his first season with the Bucs.

"I have always believed the sport of football is an 'all-in' proposition — if a 100% competitive commitment isn't there, you won't succeed, and success is what I love so much about our game," Brady wrote in a lengthy social media post.