"Titans Coach Mike Munchak acknowledged Monday that running back Chris Johnson might have lost a step through wear and tear over his four years, but Munchak said that was not the reason for the team's woeful rushing performance this season.

The Titans finished second-to-last in the NFL in rushing this season, averaging just 89.9 rushing yards per contest. Johnson, who'd averaged close to 1,700 rushing yards the past two years, ran for only 1,047 yards this year.

"You're always trying to have an answer as to why Chris Johnson didn't have 1,500 yards," Munchak said. "There's not one answer. There's a lot of answers."