 He appears on the albums "We've Come for You All" and "Worship Music", as well as the "Greater of Two Evils" compilation (a live-in-the-studio recording of older material) and the live album "Music of Mass Destruction".Rob was also part of "The Big 4" tour during 2010/2011 which featured Anthrax, Megadeth, Slayer and Metallica.The Bulgaria show was streamed and broadcast to movie theaters all over the world and the entire "Big 4" show (Anthrax, Megadeth, Slayer and Metallica) came out on DVD Nov. 2, 2010.