Charles Rosa began his training around 2008 when he went into what he thought was a boxing gym. He instantly fell in love with MMA. He is currently a brown belt in Jiu Jitsu under Ricardo Liborio. He has won multiple belts as an amateur mostly in Florida and has over 20 wins in amateur mma and kickboxing. He has fought mostly for CES MMA and had finished all of his opponents en route to a 9-0 professional record.

He would get the call up from the UFC but would face a tough test against UFC vet Dennis Siver in his first bout. He would lose a decision but managed to pick up a Fight of the Night bonus for his efforts.