"The Bucs defense is focused on stopping Titans RB Chris Johnson, who can't seem to get going.

Johnson, who signed a six-year, $56 million contract after holding out of training camp, rushed for 130 yards in a win over Carolina two weeks ago and appeared on the verge of a breakout.

But in a loss to the Falcons last week, Johnson rushed for only 13 yards on 12 carries.

"I've played against a lot of fast guys, but he has that elite speed and is extremely fast," Bucs LB Mason Foster said of Johnson, a Pro Bowl selection in each of his first three seasons. "That separates him from a lot of running backs in the league."

The Bucs rank 26th in the league in rushing defense, allowing 133.5 yards per game. Johnson has eclipsed the century rushing mark twice this season and has 509 yards and two touchdowns on 160 attempts.

That's below par for the 26-year-old from Orlando, who rushed for 4,598 yards his first three pro seasons.

"He just hasn't had the big breakout runs he had last year," Bucs coach Raheem Morris said. "Hopefully, we can continue to keep that process going. He's only one snap away from returning to his old form."