GREEN BAY, Wis. - After playing only 10 snaps against the Chicago Bears on Sunday, Green Bay Packers cornerback Jaire Alexander almost certainly won't play against the San Francisco 49ers.

Alexander suffered a torn PCL during the final moments of the Oct. 27 victory over the Jacksonville Jaguars, he told The Athletic's Matt Schneidman.

"I went out there and, (shoot), all I could really give was 10 plays and then I felt something," Alexander said. "If you know how PCL work, it don't just get done in three weeks, so it just needed more time. I reaggravated it going back out there and only doing 10 plays, so now we just trying to get my knee back right."

Because he aggravated the injury at Chicago, Alexaner is out indefinitely with big games against big-time quarterbacks on the horizon: at home against the 49ers on Sunday, at home against the Dolphins on a short week on Thanksgiving and at the Lions the following Thursday.

At least he expects to be back for a playoff run. The Packers are 7-3 with a two-game lead over the 49ers, Rams and Seahawks for the final spot in the NFC bracket.

"Yes, sir. Oh, heck yeah. Of course," he said. "You know, I just need more than 21 days of non-contact. It just needed more time because to take three weeks off and not do much, that still wasn't enough."

Alexander was injured on the final defensive play of the Week 8 victory at Jacksonville. Rather than trying to make a leaping breakup of a pass in the end zone that became a touchdown, Alexander pulled up just short of the receiver and limped off the field.

He was inactive the following week against the Detroit Lions and had the bye for a second week off. Alexander tried to play through the injury last week, practicing as limited participation all week and starting the Week 11 game at Chicago.

"I just tried to give it a go," he said.

For reference on what the injury means for a skill-position player: Rams receiver Puka Nacua was out for six weeks - five games and a bye - after tearing a PCL in September.

Alexander, who has played in 34 of a possible 61 games over the past four seasons, did what he could to get back ASAP.

"I stayed here the whole bye week trying to hopefully come back and make an impact for the team," Alexander told Schneidman. "It was a game-time decision at that, so we didn't know until a few minutes before the game if I would play or not."

The loss of Alexander can't be understated. He's allowed 10-of-21 passing this season, according to Sports Info Solutions.

He makes the defense "a lot better," coach Matt LaFleur said.

"Obviously, he adds a lot to our team, he adds a lot to our defense," LaFleur said. "But we understand he's injured, so he's going to do the things that he has to do to try to get back, and then the guys that are behind him are always going to have to be prepared."

Without Alexander, the Packers relied on Keisean Nixon and Carrington as the perimeter corners and Javon Bullard in the slot. Eric Stokes, who was a key part of the defense to start the season, played only a few snaps against the Bears.