49ers receiver Brandon Aiyuk continues to rehab from tearing his ACL and MCL in October of last season. With Aiyuk still on the physically unable to perform list, General Manager John Lynch noted in a Thursday interview with KNBR that there is not a true timetable for Aiyuk’s return to play.

It's becoming more and more likely that the San Francisco 49ers could be without one of their top playmakers when the regular season gets underway. During an appearance on KNBR's "The Murph & Markus Show" on Thursday,

John Lynch isn't confident San Francisco 49ers wide receiver Brandon Aiyuk will play in their Week 1 game against the Seattle Seahawks.