Rex Ryan (born December 13, 1962) is an American football coach. He is the head coach for the Buffalo Bills of the National Football League (NFL). He coached for the New York Jets from 2009 until 2014. After serving as an assistant coach for twenty-two years, Ryan attained his first head coaching job in the NFL with the Jets in 2009. Ryan was also a great defensive coordinaor for the Baltimore Ravens and won Super Bowl XXXV with Baltimore. He is the son of former Philadelphia Eagles and Arizona Cardinals head coach Buddy Ryan and is the twin brother of Rob Ryan, defensive coordinator for the Dallas Cowboys. Ryan is known for his outspoken manner.