The 1966 Western Michigan Broncos football team won all games they played that season, included against Ohio.
73 (51 MAC) 
In their third season under head coach Bill Doolittle, the Broncos compiled a 73 record (51 against MAC opponents), finished in a tie for first place in the MAC, and were outscored by their opponents, 194 to 175. 
L 926 L 621 L 730 at Miami (OH) at Xavier at West Texas State 
