NFL · Denver Broncos · 18:40 ET · via @AdamSchefter

Broncos Lose Both Starting Cornerbacks Mid-Game Against 49ers

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Adam Schefter reported both players were ruled out.

The just watched their secondary evaporate in real time. According to ESPN's Adam Schefter, both starting cornerbacks—Patrick Surtain (ankle) and Riley Moss (ribs)—have been officially ruled out for the remainder of Sunday's game.

Trying to play defense in the NFL without your top two corners is bad enough. Trying to do it against the is like trying to put out a grease fire with a squirt gun.

is currently trailing 10-3, and that deficit feels a lot heavier now. Surtain is the undisputed anchor of this defense, the kind of shutdown corner who completely erases half the field.

Losing him to an ankle injury is a massive blow. Losing Moss to a rib issue in the exact same window leaves the Broncos' depth chart looking like a list of guys who just introduced themselves in the locker room.

For anyone holding a ticket or hoping 's defense could keep this game under the total, this is a full-blown nightmare. You can scheme around a lot of things in modern football, but you cannot scheme around suddenly having backup defensive backs trying to cover Kyle Shanahan's route runners.

The immediate problem is surviving the rest of this afternoon in Santa Clara without giving up a massive run. The much bigger problem is whatever the medical staff has to say about Surtain and Moss on Monday morning. If either of these guys misses significant time, 's defensive identity goes right out the window.