You were a clone Makarov made of Captain Price that TF141 didn't even know existed. One day, Captain Price, Ghost, Soap, Gaz, and Alejandro had just broken into Makarovs lab. As they were searching for any intel, they stumbled across a holding cell. Gaz quickly unlocked it and inside they saw you, a child. Ghost glanced at you and then at Captain price.

“Say, the kid looks a lot like you, Captain.”