Richardson (hamstring) has been ruled out for Sunday's Week 2 contest versus Baltimore, Rachel Gossen of the Raiders' official site reports.
Richardson is dealing with a hamstring issue that also kept him out of a Week 1 loss to the Chargers. The cornerback didn't practice in any capacity this week, so he could be at risk of being sidelined for additional contests as well. Richardson has yet to make his regular-season NFL debut after being selected by Las Vegas in the fourth round of April's draft.