William Thomas Maas (born March 2, 1962) is a former American football defensive tackle who played for the Kansas City Chiefs (1984–1992), and the Green Bay Packers (1993).
Maas was selected to the Pro Bowl in 1986 and 1987.
In 1984 Maas was named The NFL Rookie of the Year by the Associated Press.
He currently works as a commentator for Fox Sports.
From 1998-01, he served as studio anchor and game analyst for NFL games.
Bill's early years were spent in suburban Pennsylvania where he grew up alongside his sister Lizanne (Annie), his brother Murray Xavier, and his adopted Vietnamese brother, Ngo.