The San Francisco 49ers have opened the 21-day practice/evaluation window for NaVorro Bowman, who is coming back from his knee injury in last year's NFC Conference Championship Game.

Tuesday was the deadline to open said window, otherwise the Niners would have had to move him from the Reserve/Physically Unable to Perform list to Injured Reserve.

The 49ers have 21 days to gauge whether to activate Bowman to the 53-man roster or place him on IR.