Jayden Daniels left the Washington Commanders' game against the Carolina Panthers on Sunday with what the team is calling a rib injury.

The rookie quarterback will not return.

His mother, Regina Jackson, posted on social media the simple message: “He’s fine.”

Daniels, who ran for 46 yards on the Commanders' first offensive snap, took several hits on their opening drive – including a head-over-heel fall on the play. It was not clear exactly when he was injured.

LSU's No. 2 pick and 2023 Heisman Trophy winner appeared to be in pain as he left the field after a third-down completion before Austin Seibert's field goal that gave Washington a 10-0 lead. He first went to the bank, but then moved to the blue medical tent to be examined.

After Andy Dalton's second interception of the first quarter, Daniels left the tent and went back on the field to throw a few passes. He returned to the sideline and slammed his helmet on the turf before returning to the tent.

Daniels then walked from the sideline through the tunnel to the locker room, towel in hand. Veteran Marcus Mariota replaced him and led a drive that ended with a Brian Robinson Jr. touchdown run to make it 17-0.

Daniels entered the game as the favorite to win Offensive Rookie of the Year honors. He threw for 1,404 yards, ran for 322 yards and accounted for 10 touchdowns in his first six games.

The Associated Press contributed to this report.

(Want great stories delivered straight to your inbox? Create your FOX Sports account or log in, follow leagues, teams and players to receive a personalized daily newsletter.)

Get more from the National Football League Follow your favorites for information on games, news and more