Ben Koller (born July 29, 1980)[1][better source needed] is an American drummer who has played with Converge, Mutoid Man, Killer Be Killed and All Pigs Must Die.

Ballou later started a side project called Blue/Green Heart and selected Koller as his drummer having already been familiar with his talent from Force Fed Glass.

All Pigs Must Die is a heavy metal band composed of Kevin Baker of The Hope Conspiracy and Ben Koller in addition to Adam Wentworth and Matt Woods of Bloodhorse.

The project was properly announced in March 2013,[12] and its debut EP, Helium Head, was released in November 2013 through Magic Bullet Records.

"[14] Koller and Brodsky were later joined by bassist Nick Cageao to form a three-piece band, and released their first full-length album Bleeder on June 30, 2015, through Sargent House.

[16] Ben Koller became his temporary replacement during Cave In's tour in support of their fourth studio album, Perfect Pitch Black.

Acid Tiger is Koller's psychedelic punk side project with Lukas Previn (The A.K.A.s), Adam Wentworth (Bloodhorse / All Pigs Must Die), and J Rattlesnake.