The Cougars won their only Missouri Valley Conference championship in 1955 - 56 .
The Cougars went on to win three Southwest Conference regular season championships and five SWC Postseason Classics between 1978 and 1992 .
The Cougars won their only Missouri Valley Conference championship in 1955 - 56 , and went on to win three Southwest Conference regular season championships and five SWC Postseason Classics between 1978 and 1992 .