NaVorro Bowman becomes eligible to come off the San Francisco 49ers' reserve/physically unable to perform list after Week 6, but he remains several weeks away from returning.

Bowman began sprinting last month.

"NaVorro's doing well in his rehab," Fangio told KNBR-AM, per NinersNation.com. "He still has to be out two more games at least, and he'll be out several after that. But he's doing well. He's had no road blocks in his rehab. Everything's gone smooth, he's ahead of where he should be, and we're looking forward to his return at some point."

Michael Wilhoite has been doing a strong job filling in for Bowman, who is an All-Pro inside linebacker. 

"His procedure was done in February," Fangio said. "It's not like he got hurt in the middle of the season last year. His rehab has gone great, but you still need enough time to rehab and recover. And he's going to need a couple weeks of practice, too, to get his legs under him and to feel comfortable playing on his leg."