Coach Antonio Pierce relayed Friday that White (groin) "more than likely" will be doubtful for Sunday's game against the Broncos, Paul Gutierrez of ESPN.com reports.
White suffered a groin injury in practice Wednesday and now is trending toward an official doubtful designation ahead of Week 5 action. In the event that White is unavailable versus Denver, Alexander Mattison would be in line to lead Las Vegas' backfield, with Ameer Abdullah and Dylan Laube on hand to mix in.