Denver Broncos star cornerback Pat Surtain II left Sunday's Week 4 game against the San Francisco 49ers with an ankle injury late in the second quarter and has reportedly been ruled out. Surtain went down on his own, without contact on the play, just before halftime. Surtain was backpedaling in coverage before stopping in the middle of the play. The cornerback appeared to be holding his ankle. He hobbled gingerly before medical personnel helped him off the field. Surtain was reportedly seen heading back to the Broncos' locker room, still walking slowly with medical personnel guiding him. Surta...