Brett Gurewitz was absent from Bad Religion 's performances between April and May 2013 .
===Departures of Hetson and Wackerman , Christmas Songs and next album ( 2013–present ) ===Bad Religion played a few shows as a four-piece ( without Greg Hetson ) in mid April–May 2013 , starting with their appearance at `` That Damn Show '' in Mesa , AZ on April 20 and including some high profile shows such as Groezrock in Belgium , leading fans to speculate over Greg Hetson 's continued involvement in the band .
Bad Religion