49ers' Mac Jones: Status in question for Week 4

Jones (knee) is listed as questionable for Sunday's contest versus the Jaguars, Nick Wagoner of ESPN.com reports.

Jones emerged from a second consecutive start in place of Brock Purdy (left shoulder/toe) this past Sunday against the Cardinals with a sprained PCL in his left knee. It limited Jones in practice Wednesday and Thursday, and his status now is up in the air ahead of Week 4 action. Coach Kyle Shanahan already told Wagoner that Purdy will start this weekend, so Jones will be the No. 2 QB, assuming he's active.