Bill Kollar

William Wallace "Bill" Kollar (born November 27, 1952) is an American football coach and former player. He is currently the defensive line coach for the Houston Texans of the National Football League (NFL), a position he has held since 2009. Kollar played as a defensive lineman in the NFL for the Cincinnati Bengals from 1974 to 1976, and the Tampa Bay Buccaneers from 1977 to 1981.

Coaching career
Kolar has been an NFL assistant coach for 17 years. He has coached the defensive line of the Rams, Falcons and Bills. Currently, he is the Houston Texans defensive line coach.