Typically, rest days are entirely inconsequential. Recently, the Colts listed Keenan Allen with a rest designation on Wednesday. He picked up a groin injury during the practice week, and although they added the groin injury to the injury report, they kept the rest designation on there as well. He didn’t play. Downs could end up being perfectly fine, but given the Colts’ recent handling of a similar situation, his participation levels on Thursday and Friday are worth monitoring.