Complex sentence: Joel D. Collier (born June 7,1932) is an American former football coach who was the head coach of the Buffalo Bills of the American Football League (AFL) from 1966 through part of 1968, compiling a 13--16--1 record.
Split into simpler sentences: Joel D. Collier (born June 7,1932) is a former American football coach. He was head coach of the American Football League's Buffalo Bills from 1966 through part of 1968, compiiling a 13--16--1 record.