DENVER (AP) -- Elvis Dumervil, returning from a torn chest muscle last August and hoping to regain the form that produced an NFL-high 17 sacks in 2009, was a force against an offense led by Tim Tebow on Saturday in the Denver Broncos' intrasquad scrimmage.

Dumervil bulked up 15 pounds to 260 for his conversion back to end in a 4-3 defense.

Playing with the first-team defense against a second unit led by Tebow, Dumervil rushed around the edge with abandon, chasing Tebow out of the pocket and twice prompting the officials to blow their whistles to signify a dead ball before there was contact.

Rookie Von Miller added a third sack of Tebow, who could only muster three pass attempts, completing one. He ran for 5 yards in his time against the first-team defense, which didn't allow a point.

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