NASHVILLE, Tenn. (AP) -- Chris Johnson doesn't believe he is solely to blame for the Tennessee Titans' rushing woes.

The running back said Thursday the fault lies with the offense as a whole. Johnson heads into Sunday's game against the Detroit Lions with 21 yards on 19 carries.

Johnson says he is an easy target for criticism because of the running game's struggles and the $53 million extension he signed last year.

Titans coach Mike Munchak says the inability to establish the run is a team problem, not a Johnson or offensive line problem. Munchak says the Titans won't make any lineup changes for now.

Munchak says Johnson might not be the same running back he was in 2008 due to wear and tear, but that doesn't explain why the Titans can't run effectively.