Bill's Father is the father of Bill Haverchuck. He is not currently married or even lives with Bill's mother, so it is assumed they are either divorced or Bill was born out of wedlock.
Biography[]
In "The Garage Door", Bill discusses to Neal about Bill's father. Upon Neal's accusation that Bill doesn't even have a father, Bill remarks, "I do too!... I saw him three months ago..."
In "Chokin' and Tokin'", when Bill wakes up from his coma, his mother remarks that she has to call Bill's father as "he was worried sick about you."