The Buccaneers also waived linebacker Chapelle Russell.
Bucannon, 28, is a former first-round pick of the Cardinals back in 2014. He played out the final year of his four-year, $7,709,200 contract when the Cardinals picked up his fifth-year option.
Bucannon left Arizona as an unrestricted free agent last year and signed a one-year deal with the Buccaneers. He was released last season and later signed by the Giants to finish out the season.
The Falcons signed him to a contract back in May but cut him loose and added him to the practice squad. He signed on to the Buccaneers’ practice squad last wek.
In 2019, Bucannon appeared in 14 games for the Buccaneers and Giants, totaling 26 tackles and no interceptions.