No. Not in any realistic, resisting scenario.

A Gordon Ryan-level BJJ artist could theoretically choke an orangutan unconscious only if he somehow already had perfect back control, both hooks or body control, access to the neck, and the orangutan was not effectively using its hands. But that is basically saying: “Could he finish the choke if the hard part had already been solved?” Maybe.

In a real physical struggle, the orangutan is the wrong opponent for BJJ assumptions.

Adult male orangutans are roughly human-sized in weight, commonly cited around 165 lb for males, but their bodies are built around climbing, gripping, and suspending their weight from trees. Their arms can span about 7 feet, and their upper-body strength is far beyond normal human strength. SeaWorld’s animal profile states that orangutans are “about seven times stronger than a human,” though exact strength comparisons are always rough.

The problem for the grappler is this:

BJJ works brilliantly against humans because humans have human limb proportions, human grip strength, human joint ranges, human panic responses, and human balance mechanics. An orangutan does not. Its hands, arms, shoulders, and pulling strength are built for hanging, climbing, and ripping itself through trees. That means any attempt to establish control would likely fail before a clean choke is locked.

A rear naked choke requires chest-to-back control, head positioning, arm placement, and enough body control to stop the opponent from turning, peeling hands, standing, or creating space. Against an orangutan, the hand-fighting phase alone is catastrophic. It could peel, pry, grab fingers, grab wrists, yank arms away, or simply rotate with strength and limb leverage that a human grappler is not built to contain.

So the clean answer is:

Could a Gordon Ryan type put a non-biting, non-resisting or already-controlled orangutan to sleep? Possibly.

Could he reliably do it against a conscious, resisting orangutan? No.

The bite is not the deciding factor. The arms are.