Elvis Dumervil suffered a torn pectoral muscle during Wednesday's practice that will sideline him indefinitely, according to league sources. Dumervil is expected to miss about four months, which means he might be able to return late this season. Dumervil, who had an NFL high and team-record 17 sacks last season, signed a five-year, $58.332 million extension last month that includes $43.168 million in guarantees.