"Chris Johnson has a new $53.5 million contract extension, but he still hasn't figured out his first big purchase.

"I have really only focused on football," the Tennessee Titans running back said Monday, "and trying to get back in the playbook and win some games."

Johnson now has a couple of practices under his belt as well, and he's confident that offensive changes under new Titans coordinator Chris Palmer aren't going to slow him down going into the season opener Sunday at Jacksonville.

"I took the playbook home Friday, and I pretty much know the whole thing,'' Johnson said. "The offense really is not too different. There are a couple of different wrinkles in it, but I pretty much know the whole thing.""