i might be wrong, but wasnt that an injury that has hampered him quite some time now? kept him out of parts of OTAs and camp? at least ive read something about that here:
http://buffalobills.com/news/news.jsp?news_id=6531
so, yes, i guess hes OPTED to do it now rather than months ago. i mean, this is nothing like merrimans who has the choice to try playing or sit. 2-4 weeks. man, he couldve done it in early august and wouldve been ready.