One more first down was all the Rams needed to close out Sunday's win. It may have cost them their best player for a month.

Los Angeles will likely place receiver Puka Nacua on injured reserve with sprains of the MCL and PCL in his right knee plus turf toe, coach Sean McVay said Monday. McVay did not give an exact timeline but said the team believes Nacua will miss at least a month.

Nacua was hurt on the Rams' final offensive snap of their 20-13 win over the Washington Commanders. On third down Los Angeles handed him the ball to try to end the game. He ran for 5 yards, took a hard hit and stayed down briefly before walking off.

McVay: 'I feel tremendous responsibility'

McVay said he has replayed that decision "over and over" in his head.

"I'd be lying to you if I said I haven't questioned the decision-making on that last play" McVay said. "And so it's stuff that I feel tremendous responsibility for and we've got to be able to figure out how to protect these guys while also putting them in positions that help our team and allow them to be able to shine."

If Nacua goes on IR he would miss games against the Arizona Cardinals, Green Bay Packers, Kansas City Chiefs and San Francisco 49ers.

A historic pace interrupted

Nacua had 14 catches for 150 yards and a touchdown on 19 targets Sunday. His 70 receptions are the most by any player through his first seven games of a season in NFL history. He also leads the league in catches and receiving yards since Week 4. That came despite missing Weeks 2 and 3 with a hip injury.

The Rams (5-4) are already without Davante Adams, who hurt his hamstring in Week 6. McVay had said the team did not expect to make a move before Tuesday's deadline. Asked Monday if that had changed, he said: "I think you've got to look at all avenues ... I would never rule it out."