Greg K. is one of the founding members of The Offspring alongside singer Dexter Holland. Prior to forming The Offspring, he was also on the track and field team at Pacifica High School, along with bandmate Holland, where he took up playing the bass guitar. Greg K. and Holland had been playing locally since the early 1980s and formed Manic Subsidal in 1983. After hiring Noodles as their new Guitarist, Manic Subsidal changed their name to The Offspring in 1986. he attended Cal State Long Beach.