Mason Cooper was a drummer for Jimmy Eat World for a brief time in the early 1990s. Mason was later replaced by current drummer Zach Lind.
Mason brother Adam's Cooper, was a guitarist for Tempe band Alison's Halo. Jimmy Eat World and Alison's Halo both played their debut shows in December of 1992 at an old Odd Fellows Hall. 
Other Projects/Solo Work
- |last1=Harris|first1=Ashley|title=Now You Can Own Eyedazzler by Alison's Halo on Vinyl|url=https://www.phoenixnewtimes.com/music/alisons-halo-eyedazzler-vinyl-record-shoegaze-tempe-arizona-9331390%7Caccessdate=2021-01-24%7Cissue=Phoenix New Times|date=2017-05-19