San Francisco 49ers head coach Kyle Shanahan hasn't thought about it much, but said that wide receiver Brandon Aiyuk (knee) might return in Week 6. General manager John Lynch already said that he didn't think Aiyuk would be ready for Week 1 of the regular season in early September, but now it looks like the 27-year-old pass-catcher will be out much longer after tearing both his MCL and ACL in his right knee last October. Aiyuk is expected to begin the season on the Physically Unable to Perform ...