Marc was the drummer in Weatherbox during American Art era.
But more importantly, he is the man behind Boomsnake. This song has been posted for a while. There are a lot of band overlaps in that San Diego scene:
Edit: there's actually another one song band up on bandcamp with other members of Snuffy and Cults. Also, check out the band Willowz and Guards.
haha these guys do overlap a lot which is awesome. marc is the original weatherbox drummer (from when brian just sang and they were a 5 piece) and has been on every recording the 'box has put out. marc also contributes to boomsnake but is not the man behind it...that would be gabe (who is also in cults as keyboardist/second guitar, and was in weatherbox pre american art). either way this group of musicians puts out some of the best stuff around.