The Los Angeles Rams placed Cooper Kupp on injured reserve Saturday, keeping their star wide receiver out at least through the first four games of the season.

Kupp, who missed the final eight games of last season with an ankle injury, injured his hamstring during training camp in early August. He then suffered a setback with his hamstring late last month and travelled to Minnesota to see a specialist last weekend.

“(Kupp) wants to be out there with his teammates, and he puts so much into it,” Rams coach Sean McVay told reporters. “It’s so unfortunate. It’s been frustrating.

“Really not much more information,” McVay said. “Just dealing with some soft-tissue stuff, just trying to get him to feel back to normal. When that ends up occurring, we'll have him back, but in the meantime, he will not be playing for us.”

Kupp, 30, has been a productive player since his rookie season, but his numbers exploded when he was paired with quarterback Matthew Stafford two years ago.

Kupp made 145 catches for 1,947 yards and 16 touchdowns in 2021, then added six scores during the Rams’ playoff run that ended with a title and Kupp being named Super Bowl 56 MVP.

Kupp began last season on a torrid pace again, catching 75 passes in the Rams’ first nine games before his campaign ended abruptly.

“I know he's going to do everything he can to be as good as he possibly can, as quick as he can,” Stafford said. “He's as good of a professional as I've ever been around when it comes to taking care of his body and trying to get himself right, so I know it's disappointing for him to not be out there.”

A third-round pick out of Eastern Washington in 2017, Kupp has 508 career receptions for 6,329 yards and 46 touchdowns.

The Rams open their 2023 season on the road Sunday against the Seattle Seahawks.