Chicago Bears rookie receiver Luther Burden has learned quickly that head coach Ben Johnson has a high standard.

Burden injured his hamstring during the Bears’ organized team activities this spring and did not take part in the first four practice sessions of this summer’s camp, but reporters at Monday’s session noted that the second-round pick is participating in drills.

LAKE FOREST, Ill. — In the span of a week, it went from worries about Chicago Bears wide receiver Luther Burden III’s injury to seeing him thrown out of a drill for being in the wrong spot to his No. 87 being written over and over in every notebook at Halas Hall.