Preseason Big 12 defensive player of the year Auston English is out indefinitely after undergoing surgery for an emergency appendectomy last weekend in Norman, Okla.
Oklahoma sports information director Kenny Mossman said Monday that OU doctors believe English will be ready for the Sooners' opener Aug. 30 against Chattanooga. The Sooners begin preseason team practices next Monday.
"The operation is already a week old and he's begun his recuperation," Mossman said. "Our trainers think he can make a complete recovery and be ready for the opening game of the season."
English, a 6-foot-3, 253-pound junior from Canadian, Texas, was announced as a preseason All-Big 12 selection last week and is on the watch list for the Ted Hendricks Award that is given annually to the nation's top defensive end.
Despite missing Oklahoma's last three regular-season games last season with a hairline ankle fracture, English was selected as an All-Big 12 defensive end and led the conference with 9½ sacks.
Tim Griffin covers Big 12 football for ESPN.com.