Thomas Chandler "Chan" Gailey, Jr. (born January 5, 1952) is the 15th and current head coach of the Buffalo Bills of the National Football League. He was formerly head coach of the Georgia Tech Yellow Jackets football team and the Dallas Cowboys.
Gailey had previously served as offensive coordinator for the Miami Dolphins in 2000–01 when the Dolphins posted consecutive 11–5 records. He was on the Pittsburgh Steelers staff from 1994-97 when the Steelers won four straight AFC Central titles and coached in one Super Bowl (XXX). He was offensive coordinator in 1997 when Pittsburgh ranked sixth in the NFL in total offense and seventh in scoring. Gailey served as the offensive coordinator for the Kansas City Chiefs in 2008 and three games of the 2009 pre-season before he was relieved of duties by Chiefs head coach Todd Haley.
Gailey was born in Gainesville, Georgia in 1952. He attended Americus High School in Americus, Georgia, where he was an Eagle Scout, and a letterman in high school football, basketball, baseball and golf. In football, he was an all-state selection as quarterback. Gailey graduated from Americus High School in 1970.