Doc Holliday was a gambler and gunfighter of the American Old West. Doc Holliday may also refer to: Doc Holliday (American football) (born 1957), American football coach Doc Holliday (announcer), radio personality Roy Halladay (1977–2017), Major League Baseball pitcher Doc Holliday (band), a southern US rock band Doc Holliday, song from the album Outlaw Gentlemen & Shady Ladies (2013) by Volbeat Holliday, Doc