<Li> Big Eight Conference (1960--1995) </Li> <Li> Big 12 Conference (1996--present) </Li> <P> OSU has 1 claimed national championship from 1945, retroactively awarded in 2016 by a committee representing the Coaches' Poll. (1), won 7 Missouri Valley Conference Championships, 2 Big Eight Conference Championships, and 1 Big 12 Conference Championship . </P> <Table> <Tr> <Th> Season </Th> <Th> Coach </Th> <Th> Selectors </Th> <Th> Record </Th> <Th> Bowl </Th> </Tr> <Tr> <Td> 1945 </Td> <Td> Jim Lookabaugh </Td> <Td> AFCA (Coaches) </Td> <Td> 9--0 </Td> <Td> Won Sugar Bowl </Td> </Tr> <Tr> <Td_colspan="3"> Claimed National Championships </Td> <Td_colspan="3"> </Td> </Tr> </Table>

When was the last time oklahoma state won a national championship in football