Rubin began playing drums at the age of 8 upon finding his father's old drum kit in the family's garage and within three months had taught himself to play. At the age of 9, he began playing alongside his brothers and soon joined the band F.o.N., who played at three stints of the Vans Warped Tour. Rubin became a fill-in drummer for NOFX on one of those tours. By 1999, Rubin would join F.o.N. at Woodstock '99, earning him the honor of being the youngest person to ever play at a Woodstock festival, at the age of 11.
That same year, Rubin submitted a video of himself playing a drum solo to [i]''Modern Drummer's[/i] '' "Best Undiscovered Drummer" contest, winning the title in the under-18 category. He was only 12 when he earned the title. Rubin has taken lessons from Travis Barker and David Uosikken. In addition to drums, Rubin is a guitarist and pianist.
Shortly after F.o.N. disbanded, Rubin joined the Denver Prophets along with his older brother and two members of the band Fenix*TX. The band released one album on 2004 before being dropped from their label.