The San Francisco 49ers don't know for sure when Brock Purdy will be ready to play football, but both the quarterback and Kyle Shanahan are optimistic about a Week 1 return.

"We're hoping for Week 1 and we feel pretty optimistic about that," Shanahan said. "That's what we're hoping for. ... Usually you've got to come back before that to make that goal and that's kind of the goal we're hoping for and don't have any reason to think different."

Purdy had the torn ulnar collateral ligament in his right elbow repaired March 10 after suffering the injury in the NFC Championship Game on Jan. 29.

Initial estimates for a timeline were five to seven months but the Niners have maintained all along that they will have a better idea on a return date once Purdy begins a throwing program at the 12-week mark.

He will hit the 12-week mark on June 2.