West Virginia QB Will Grier is rushed to the locker room after injuring his throwing hand against Texas. (0:57)

MORGANTOWN, W.Va. -- West Virginia quarterback Will Grier is expected to be out four to six weeks after undergoing surgery to repair the broken middle metacarpal in his throwing hand.

Grier broke his right finger while trying to score on a run against Texas on Saturday. After the game, he flew to Charlotte, North Carolina, near his hometown, where he underwent successful surgery on Sunday.

Sophomore Chris Chugunov is expected to start for the Mountaineers next weekend at Oklahoma.

West Virginia quarterback Will Grier landed awkwardly on his right hand while diving for the pylon in the first quarter Saturday, resulting in a broken middle finger. Frank Jansky/Icon Sportswire

Grier dived for the pylon in the first quarter Saturday and landed awkwardly on his right hand. His middle finger appeared to be bent backward as he held up his hand while running to the sideline. He was bent over in pain as athletic trainers worked on him.

A review determined Grier had fumbled before he reached the pylon and the ball went out of the end zone. Texas took over on the touchback.

Backup Chris Chugunov replaced Grier on West Virginia's next series. Chugunov completed 14 of 26 passes for 189 yards and one touchdown in the Mountaineers' 28-14 loss to the Longhorns.

Grier entered the game second in the nation with 34 touchdown passes. He finished 6-of-8 passing for 50 yards.

Information from The Associated Press was used in this report.