Murphy is a tank operating agent of the Sand-Blasters, a team of Freedom Fighters based in Sand Blast City. He was present during a Sand-Blaster ambush of the Great Desert Dark Egg Legion during a prisoner exchange, and was ordered by Jack Rabbit to fire on the Legion carrier. Murphy briefly hesitated, as the order involved harming Mighty the Armadillo, who had joined the team under pretenses, as well as two children-Matilda the Armadillo and Ray the Flying Squirrel. However, when Jack screamed the order to fire again, Murphy complied; his attack resulted in Matilda being injured and Mighty going on a rampage that routed the Legion forces. (SU: #49)
- Murphy was not seen in the issue where he debuted, and was identified during his radio conversation with Jack.