With Willis McGahee and Jeremiah Johnson absent from Wednesday's organized team activity and Knowshon Moreno still completing recovery from a torn ACL, reserves Lance Ball, Mario Fannin, Xavier Omon and rookie Ronnie Hillman got the call as the Broncos began their second week of OTAs. Ball, who relieved McGahee after Moreno's injury last year, was the first running back up during the 95-minute practice.