The Oakland Raiders don't know if Marshawn Lynch will return to the field next season, but Jon Gruden says the team needs a "full-time" Lynch to succeed.

Gruden was responding to a question about Lynch not rounding into football shape until the second half of last season.

"We're not going to have that," Gruden replied.

"No. I said to him: 'I need Marshawn Lynch. I don't need this part-time Lynch. I need full-time Lynch,'" the coach said, recounting a meeting with the running back.

"We need the real deal," he continued. "If you're going to put those letters on the back of your jersey, man, you've got to back it up, Marshawn -- right? We don't need another back, we need a feature back."