I think if Merriman can pass a physical, he is back. The Bills are incredibly weak at the position he plays. Whether he makes the team remains to be seen.
Please correct me if I am wrong but juicing aside, didn't his problems in San Diego begin when he refused to have knee surgery in the off season? Then a couple of games into the season decided to have the surgery and went on IR, sound familiar? I think tha he is reluctant to go under the knife. He seems to think that in time he will heal, his problem is he is running out of time.