Johnson was signed by the Bucs on Monday to compete for a backup job, Greg Auman of the Tampa Bay Times reports.
The 23-year-old tailback returns to the NFL after sitting out the 2015 season. Johnson was among the Jaguars' final cuts at the end of training camp last summer, after tallying 86 yards and a pair of touchdowns in his rookie campaign in 2014. The 5-foot-10, 216-pound back, who rushed for 1,139 yards and 14 touchdowns in his senior season at UCF, worked out for the Bucs last week. He'll likely wage a training camp battle with incumbent Mike James for the third running back spot behind Doug Martin and Charles Sims.