ESPN.com’s Bill Williamson said that the injury will sideline him indefinitely.
The injury is huge for a Broncos team that was expected to be in the mix fighting for the top spot in the AFC West with San Diego.
As Williamson correctly points out, with Dumervil out, Denver will need to get production out of two former No. 1 picks, Jarvis Moss and Robert Ayers.
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.