Of this group, the Buccaneers signed Clarke and added Murray to their practice squad this morning.
Knight, 23, wound up signing a three-year, $1.66 million contract with the Cardinals as an undrafted free agent out of Texas A&M back in May. He was set to make base salaries of $465,000 and $555,000 over the first two years of the contract when the Cardinals cut him loose this past weekend.
During his college career at Oklahoma and Texas A&M, Knight threw for 5,856 yards while completing 55.5 percent of his passes to go along with 44 touchdowns and 26 interceptions and a quarterback rating of 124.2 over the course of 35 games. He also rushed for 1,467 yards and 18 touchdowns.