Johnny MacCarthy
From Super-wiki
John MacCarthy, known on set as Johnny Mac, is the first assistant director. He works on the "odd"-numbered episodes of Supernatural, while Kevin Parks works on the odd-numbered ones. He also worked with Jensen on Dark Angel.
Johnny directed 7.20 The Girl with the Dungeons and Dragons Tattoo in season 7.
Trivia: He bought Sam's Charger in November 2011. source
