LANDOVER, Md. — Washington Commanders quarterback Jayden Daniels suffered a rib injury on his first possession of Sunday’s game and was ruled out against the Carolina Panthers.

Daniels headed to the locker room in the first quarter and did not return to the sideline until after halftime, when he was dressed in street clothes.

A source told ESPN’s Jeremy Fowler about Daniels’ X-ray: “He’s good.”

Daniels appeared to suffer the injury at the end of a 46-yard run on the Commanders’ first play from scrimmage. At the end of the run, Daniels turned slightly to his left to try to stiff arm Panthers safety Lonnie Johnson Jr. Linebacker Marquis Haynes helped tackle Daniels from behind as well.

After the next play, a handoff to Austin Ekeler, Daniels appeared to grab at his left side as he carried out a fake run to the left.

Daniels carried the ball two more times on the series. After the possession, trainers examined Daniels on the sideline before he went to the medical tent.

He threw a warm-up pass on the field before the Commanders’ next offensive series and grimaced in pain. He left the field and slammed his helmet to the ground on the sideline as Marcus Mariota took over.

Daniels, has been the main sparkplug on an offense that entered the game ranked second in scoring, soon walked into the locker room for the remainder of the half.

In the first six games, Daniels completed 75.3% of his passes for 1,404 yards, six touchdowns and two interceptions. He also rushed for 322 yards and four more scores.