Grizzly was one of the members of Cable's mercenary group originally named the Wild Pack. Because of conflicts with Silver Sable's group of the same name, they changed their name to the Six Pack instead. During a mission for the arms dealer Tolliver, the Six Pack fell apart.
Years later, G. W. Bridge, another Six Pack member, asked Grizzly to join Weapon P.R.I.M.E., a group created to capture Cable. Weapon P.R.I.M.E. failed and Grizzly left the team, then teamed up with Domino. Domino joined X-Force, Cable's group, shortly afterward and Grizzly went home to lead a quiet life.
Sometime later, he became a serial killer while under mind control from Genesis, Cable's son. Domino investigated the deaths and fought with Grizzly. She was forced to kill him but promised the dying Grizzly not to tell Cable about his son's actions.
Following the foundation of a mutant state in Krakoa by the hand of Charles Xavier and his allies, Grizzly resurfaced as a citizen of the nation, having been presumably reborn by the hand of The Five, a group of mutants capable of combining their powers into a process of resurrection, brought together by Xavier as part of his plans for mutant ascension. He was seen hanging around shortly after Krakoa gained sovereignty and the X-Men won their battle against Mother Mold.
