"There are puzzled looks and unanswered questions in the Tennessee Titans' offensive meetings.

What's up with running back Chris Johnson?

"We're all scratching our heads about it a little bit," quarterback Matt Hasselbeck said.

From his 2008 rookie season through last season, Johnson rushed for an NFL-best 4,598 yards. During the Titans' 3-3 start, his 268 yards rank 32nd in the league. He is averaging 2.9 yards per attempt.

For perspective, consider Johnson has 9 more yards than Colts rookie Delone Carter, 11 more than Joseph Addai."