Based on Thursday’s practice participation, there’s a chance the Green Bay Packers will be at or close to full strength in the secondary on Monday night against the San Francisco 49ers.

Cornerbacks Jaire Alexander and Bashaud Breeland and safety Jermaine Whitehead all returned to practice in limited fashion Thursday after missing last week’s loss to the Detroit Lions.

Safety Kentrell Brice was limited again with an ankle injury, while cornerback Kevin King practiced fully after suffering a laceration on his chin in Detroit.

Alexander injured his groin during the Packers’ win over the Buffalo Bills in Week 4. He didn’t play Sunday despite signs during the week he would be ready. Coach Mike McCarthy sounded cautiously optimistic Alexander would be capable of playing against the 49ers.

Breeland signed on Sept. 26 but hasn’t yet made his debut. He’s dealing with a hamstring injury that kept him out of the Packers’ loss to the Lions. His return could give the Packers five capable cornerbacks, joining Alexander, King, Tramon Williams and Josh Jackson.

Whitehead hurt his back during the week last week. He’s turned into a versatile weapon for defensive coordinator Mike Pettine, generally as a slot defender in the dime defense.

The Packers will face backup quarterback C.J. Beathard on Monday night. The 49ers rank 22nd in the NFL in passing yards through five games.

On offense, the Packers were without quarterback Aaron Rodgers (knee) and tight end Jimmy Graham (knee), but receivers Randall Cobb (hamstring) and Geronimo Allison (hamstring) participated in a limited fashion.