With a simple punch to the football, all the takeaway drills that Broncos coaches ask their players to complete paid off for rookie Lamin Barrow.

That forced fumble, near the goal line against tight end Virgil Green, provided the defense with a successful stop of the Brock Osweiler-led offense in a goal-to-go period during Friday's training camp practice.

It was one of the best plays in training camp for the Broncos' fifth-round pick in this year's draft. But Barrow deflected praise for the play, and wanted to share the credit with fellow linebacker Brandon Marshall, who recovered the fumble.

"Brandon made a great play getting to the point of attack with Virgil," Barrow said. He went to strip it out at the same time I went to punch it. The ball just popped out."

"Popped" is an apt word, because that describes the decisive force that Barrow has shown, particularly against the run, during recent training-camp practices. After a bit of a slow start when camp opened July 24, his improvement has become profound as he learns how to read developing plays and how best to attack them.

"Coming into camp, I was a little sluggish as far as breaking and getting to the ball," Barrow recalled. "I think I broke myself out of that and got my legs up under me."

Defensive Coordinator Jack Del Rio has noticed.