Packers lead CB Jaire Alexander left Thursday night's game against San Francisco with a concussion. Losing Alexander didn't matter against a depleted 49ers offense, but we'll see how much longer he remains out. ILB Krys Barnes also left the game early with a calf injury and did not return. We'll see whether Christian Kirksey can get back into the mix for Week 10. Kirksey has been out since Week 3 with a shoulder injury.