San Francisco lost for the fourth time in its last five games, falling to 6-8 with a very slim chance of reaching the postseason.

When asked if this was a sign that he had “lost the locker room” amid a season full of struggles, Shanahan strongly disagreed.

“I didn’t lose anyone,” he said. “This is someone who doesn’t want to play football. This is pretty simple. I think our team and I know what we think about it. So I don’t think we need to talk about him anymore.”

It appeared the players were united in their dismay at Campbell’s decision.

“Look, when you’re on the roster and you dress, you’re expected to play,” said 49ers tight end George Kittle, who was unaware of the situation during the game. “I think anyone in this building who is asked to go in, I think 100% of people would die to get on that football field. And so people go through, experience random things off the field, I can’t. “Whatever his decision was, it wasn’t for this organization, it wasn’t for this team and that’s on him. I wish I had heard of the field, but I didn’t. Is that why we lost? But it’s hard to win football games when you don’t want to play football, especially when you lose two linebackers.

Although Shanahan didn’t speculate about Campbell’s future, 49ers cornerback Charvarius Ward didn’t mince his words when he predicted Campbell would soon be a former teammate.

“He’s a professional, he’s been playing for a long time,” said Ward, who played his third game Thursday since returning to the team following the death of his 1-year-old daughter. “I mean if he didn’t want to play he shouldn’t have taken his clothes off, he could have told them that before the game. So I feel like that was some stupid thing he did. Definitely hurt.” Team because Dee was out and we needed a linebacker.

“In my opinion this is pretty stupid. It’ll probably be canceled soon, so that’s what it’s all about.”

Campbell, 31, did not play a snap on Thursday. Campbell, a former player for the Atlanta Falcons, Arizona Cardinals and Green Bay Packers, signed with the 49ers this offseason largely to fill the void left by Greenlaw. He played in each of the team’s first 13 games, starting 12, including last week against the Chicago Bears. Entering the evening, he was second on the team with 79 tackles.

Shanahan said he has never seen a player refuse to play in a game. He added that some 49ers saw the situation developing, but it wasn’t a distraction.

“People noticed, but when someone says that, you move on,” he said, “you don’t deal with it anymore.”