De’Vondre Campbell wasn’t ready for Thursday night football.

The San Francisco 49ers linebacker refused to enter the game when his number was called in the third quarter of the Niners-Los Angeles Rams game on Thursday, December 12, much to the dismay of his teammates and coaches.

“Whatever his decision was, it wasn’t for this organization, it wasn’t for this team and that’s on him,” 49ers tight end George Kittle said in his postgame comments following San Francisco’s 12-6 rout. Defeat at Levi’s Stadium. “I’m not very happy about it. I would have had something to say. I wish I had heard about it on the field, but I didn’t.”

Kittle continued: “It’s just stupid. It’s just stupid. It’s very immature. I just don’t understand how you could do something like that to your team.”

Head coach Kyle Shanahan summed up the former Green Bay Packers player’s comments to him: “He said he didn’t want to play today.”

With two other linebackers sidelined, the team needed Campbell, although he himself seemed unhappy about getting less playing time because Dre Greenlaw returned to the team on Thursday after tearing his Achilles tendon in Super Bowl LVIII.

When Greenlaw left the game with knee soreness — and linebacker Dee Winters also didn’t play — it was Campbell’s signal to take the field.

Third street linebacker Demetrius Flannigan-Fowles was brought into the game instead.

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“Is that why we lost? Absolutely not…try to win football games when someone doesn’t want to play football, especially if you’re well dressed,” Kittle said. “It kind of makes you depressed, especially when you lose two linebackers.”

Now, Campbell’s status with the team is uncertain, much like the 49ers’ playoff prospects.

“People noticed, but when someone says that, you move on,” Shanahan 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 we don’t have to talk about him anymore.”

Greenlaw was a rare bright spot in the game, leading the team with eight total tackles at halftime, including three solo, before having to leave due to knee soreness.

In May, 49ers linebacker Fred Warner spoke to PEOPLE about the bond he shares with Greenlaw and his devastation when the player sat out the big game last February.

“Yes, those were real feelings,” Warner told PEOPLE. “Right now I’ve just been through everything, which is natural when you’re out there losing a brother, especially one that I’m as close to Dre as anyone I’ve ever played with, and that’s why my heart hurt for him hurt.” At that moment he knew what was ahead of him and obviously lost it for this game, especially because of the game he had.