The Browns confirm the injury to his pectoral muscle, but have no new information to report.
The Browns confirmed that linebacker D'Qwell Jackson injured his right pectoral muscle -- not the one surgically repaired last season -- at Tuesday's evening practice, but a club spokesman had no new information.
Neal Gulkis, vice president of public relations, said that Jackson will need more tests to determine the severity of the injury. He said no new information was expected to be released today.
Jackson was coming back for a torn pectoral muscle suffered in a game at Pittsburgh Oct. 18. He had surgery in the offseason and declared himself 100 percent recovered at the start of training camp.
If the other pectoral was torn Tuesday night, Jackson likely would be lost for the season. A lesser injury would enable him to play at some point this year.
Denver Broncos linebacker Elvis Dumervil, who led the NFL in sacks in 2009, recently tore a pectoral muscle and is likely out for the season.