In October 2006, Ferrer became an official member of the American hard rock band Guns N' Roses after serving as the band's emergency substitute drummer for Bryan Mantia on several occasions during the band's summer 2006 European tour.
Bryan Adams | William Jennings Bryan | Bryan Ferry | Bryan, Texas | Bryan Robson | Bryan Singer | Luke Bryan | Bryan Josh | Bryan Wong | Bryan Sykes | Bryan | Bryan Fuller | Bryan Ansell | Bryan Scary | Bryan Cave | Daniel Bryan | Bryan Magee | Bryan Lee O'Malley | Bryan Hitch | Bryan Forbes | Bryan Brown | Bryan "Brain" Mantia | Bryan S. Turner | Bryan Roy | Brampton Bryan | Gary Bryan | Bryan Talbot | Bryan Sutton | Bryan Steele | Bryan Procter |
Comprising multi-instrumentalist and vocalist Bootsy Collins, vocalist and guitarist Greg Hampton, guitarist Buckethead, drummer Bryan "Brain" Mantia and DJ Tobe "Tobotius" Donohue (also known as DJ Botieus), the band has released the album Living on Another Frequency in October 2008.