IRVINE, Calif. — Los Angeles Rams rookie receiver Pharoh Cooper probably will miss the regular-season opener after getting hurt in an exhibition game Saturday.

Rams coach Jeff Fisher said Sunday night that Cooper has an injured shoulder.

Cooper has two receptions for 30 yards and a touchdown in the Rams’ first three preseason games. The fourth-round pick from South Carolina also has returned four punts for Los Angeles.

Fisher also said cornerback E.J. Gaines will miss “some time” with a strained quadriceps muscle.

Offensive tackle Greg Robinson and cornerback Troy Hill went into the NFL’s concussion protocol after the Rams’ loss at Denver. Fisher says both players are “way ahead of schedule and didn’t have any residual effects.”

Los Angeles finishes its preseason schedule at Minnesota on Thursday night.