- "Who's Soap?"
- — Worm, referring to Captain MacTavish after Price and Soap reunite.
Worm was born in America and works for the U.S Navy SEALs. He has short black hair and is seen in a full body wetsuit with black face camouflage.
Worm participated in the assault of a Russian Gulag. He was heard in the beginning of the mission when the squad arrived. He makes it to the bottom of the prison along with Roach and Soap and helps secure Prisoner #627, revealed to be Captain John Price. Upon Price referring to MacTavish by his nickname, he comments "Who's Soap?". Worm and the others escape the Gulag by hooking themselves to a helicopter's zip SPIE rig. He is dangerously close to death as a missile's explosion just nearly catches him as they are evacuated.
- Sometimes before the player breaches the last wall in "The Gulag", there are two soldiers with Soap and Roach. When the player breaches the wall and takes a hit from Price, the soldiers disappear and Worm appears in their place.