RB Helu sidelined by hamstring injury

LB Perry Riley (groin), RB Roy Helu (hamstring), RB Evan Royster (groin/hamstring), RB Tim Hightower (knee) and RB Tristan Davis (knee) didn't participate in OTAs Thursday. Coach Mike Shanahan said Helu hurt his hamstring last week. Shanahan said none of the injuries would keep players out once they start full practices. WR Leonard Hankerson (hip) participated in drill work, but won't go full speed until training camp.