Carlos was a Cuban rebel at the time of the Bay of Pigs Invasion. During this time, he was second in command of the Cuban Resistance. The US supported the Cuban Resistance, and Carlos, by giving them air support via AC-130. In turn, he himself supplied Alex Mason, Frank Woods, and Joseph Bowman with an escape plane. Carlos' last name is currently unknown.
While plotting Fidel Castro's assassination in his bar in Havana with Alex Mason, Frank Woods, and Joseph Bowman, a female dancer walks out from behind the back rooms. She attempts to attack Bowman, but he pushes her away. She attempts to bite him, so Bowman is forced to shoot her. Suddenly, zombies break the front door down and walk in. Carlos and the three S.O.G. soldiers grab their ASPs are start to fight the undead horde.
Later, Carlos and the S.O.G. team attempt to reach the escape plane. While running across the airfield, Carlos is attacked by several zombies only meters away from the escape plane. The plane takes off, and Mason is unable to save Carlos. However, Carlos' death was never confirmed, and it is possible he is still alive.