Here are some casting ideas.
Will Ferrel: as the overly confident and cocky winningest man in BBQ
Sam Elliot: as the grizzled old BBQ veteran ala Johnny Trigg
Owen Wilson: as a new age BBQ zenmaster type who meditates and believes in being one with the meat
Ben Stiller: as a BBQ tech junkie that has the most expensive pit and every BBQ gadget and has taken every class imaginable, but still can't win.
Just a few that popped into my head.