Ultimate Fits - The Very Worst Of Roy D. Mercer - Prank call king Roy D. Mercer is a fictional character created by disc jockeys Brent Douglas and Phil Stone on radio station KMOD-FM in Tulsa, Oklahoma. Brent Douglas, who performs Mercer's voice, uses the character as a vehicle for comedy sketches in which he performs prank calls. Twelve Roy D. Mercer albums have been released, all on Capitol Records Nashville or Virgin Records Nashville. Ultimate Fits showcases the most hilarious moments from Capitol Nashville's catalog of 17 Roy D. Mercer prank call comedy albums and also debuts two brand new pranks.