The Tennessee Titans will be "very cautious" with Marcus Mariota as he rehabs from a broken fibula.

"We texted back and forth last night. He's on schedule," Mike Mularkey said Wednesday during an in-studio visit with The Midday 180 in Nashville.

"I saw some video of him in a pool, one of the treadmills that are now designed to keep the weight off but you can still walk. That was good to see, him walking on that treadmill. He's right on schedule."

Mularkey said he doesn't have specific dates for benchmarks in recovery.

"I think we're going to be really smart about how we handle him and probably be overly cautious," he said.

Mariota suffered the injury in Week 16.