MIAMI BEACH, Fla. — Ricky Williams is at ease enough with himself to approve a tell-all documentary on his life.

The Miami Dolphins running back was at Monday night's premiere screening of "Run Ricky Run: Hard to Tackle, Harder to put a Finger On," at The Colony Theater on South Beach. He said he can envision life after football becoming closer to reality, and was uncertain if he'll play beyond this season.

"I'm not sure," Williams said. "There's a very good chance it could be, but I'm not sure. My body is probably the single biggest factor in the decision. Football is a game, especially the way I play, where if you can't be 100 percent, you can't do it."

In addition to a number of Williams' teammates, including newly acquired wide receiver Brandon Marshall, Dolphins head coach Tony Sparano and general manager Jeff Ireland were among those in attendance along with their wives. Williams acknowledged there will be a few surprises in the film, the latest in ESPN's "30 for 30" series, for his teammates and he expects to take some ribbing Tuesday in the weight room.

Williams said he isn't approaching this season any different, knowing it could be his last, even though is only 900 yards shy of surpassing Hall of Famer Larry Csonka as the Dolphins' all-time leading rusher.

"I'm looking forward to this season," Williams said. "I think we did a good job in the draft. We got some defensive players and we've got Ronnie (Brown) coming back, we got a receiver and both Chads (Henne and Pennington). I'm looking forward to this season. It's going to be fun."

Williams hopes to raise between $10,000 and $20,000 from the premiere, with proceeds going to benefit the Ricky Williams Foundation. He got his first look at the film Sunday night in New York City.