Rock, (real name: Samuel John LaRoquette) is a Marvel Comic villain, and an enemy of the Hulk.
When one of LaRoquette's Hulkbusters team-mates was killed during a training mission that was interrupted by Doc Samson, LaRoquette swore vengence against anything with blood filled with gamma radiation.
Though having to work with Dr. Samson as part of a deal with SHIELD, he still wished to kill both the Rick Jones' Hulk and the Bruce Banner's Hulk version.
When Nick Fury shut down the Hulkbusters, the Leader offered both him and his former team-mate Redeemer to help him to defeat the Hulk. He also joined The Leader's team known as the Riot Squad.