The 49ers have placed WR Michel Crabtree on the Physically Unable to Perform list due to a nagging foot injury.
Crabtree, who was expected to be the team's top receiver this season, could miss four to six weeks according to the Sacramento Bee. The third-year pro missed the team's player-run workouts this summer due to the injury, and it appears it's more serious than the team believed.
The Niners were one of the team's speaking with the Bengals about Chad Ochocinco before he was dealt to the Patriots on Thursday afternoon. San Francisco is thin at wide receiver, especially if Crabtree misses any regular season action.
The team also placed FB Bruce Miller and WR Dominique Zeigler on the PUP list.