San Francisco general manager John Lynch reiterated Tuesday that he's still "hopeful" Aiyuk (knee) will play at some point this season, though he acknowledged that he wasn't sure how realistic the wideout's return might be, Cam Inman of The San Jose Mercury News reports.
Purdy completed 16 of 29 passes for 168 yards and a touchdown in Sunday's 26-8 win over the Browns. He added four rushing yards and a TD on two carries.
The 49ers elevated Gay from the practice squad to the active roster Saturday, and he will serve as the 49ers' starting kicker against the Browns on Sunday.