<Table> <Tr> <Th_colspan="2"> Clemson Tigers football </Th> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> </Td> <Td> 2017 Clemson Tigers football team </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> First season </Th> <Td> 1896 (1896) </Td> </Tr> <Tr> <Th> Athletic director </Th> <Td> Dan Radakovich </Td> </Tr> <Tr> <Th> Head coach </Th> <Td> Dabo Swinney 10th season, 100--29 (. 775) </Td> </Tr> <Tr> <Th> Stadium </Th> <Td> Memorial Stadium (Capacity: 81,500 (86,092 record)) </Td> </Tr> <Tr> <Th> Field surface </Th> <Td> Natural Grass </Td> </Tr> <Tr> <Th> Location </Th> <Td> Clemson, South Carolina </Td> </Tr> <Tr> <Th> Conference </Th> <Td> Atlantic Coast Conference </Td> </Tr> <Tr> <Th> Division </Th> <Td> Atlantic </Td> </Tr> <Tr> <Th> Past conferences </Th> <Td> Southern Intercollegiate Athletic Association (SIAA) (1896--1921) Southern Conference (SC) (1921--1952) </Td> </Tr> <Tr> <Th> All - time record </Th> <Td> 728--458--45 (. 610) </Td> </Tr> <Tr> <Th> Bowl record </Th> <Td> 22--19 (. 537) </Td> </Tr> <Tr> <Th> Playoff appearances </Th> <Td> 2 (2015, 2016) </Td> </Tr> <Tr> <Th> Playoff record </Th> <Td> 3--1 (. 750) </Td> </Tr> <Tr> <Th> Claimed nat'l titles </Th> <Td> 2 (1981, 2016) </Td> </Tr> <Tr> <Th> National finalist </Th> <Td> 1 (2015) </Td> </Tr> <Tr> <Th> Conference titles </Th> <Td> 22 (4 SIAA, 2 SoCon, 16 ACC) </Td> </Tr> <Tr> <Th> Division titles </Th> <Td> 6 (2009, 2011, 2012, 2015, 2016, 2017) </Td> </Tr> <Tr> <Th> Rivalries </Th> <Td> South Carolina Gamecocks Florida State Seminoles Georgia Tech Yellow Jackets Georgia Bulldogs </Td> </Tr> <Tr> <Th> Consensus All - Americans </Th> <Td> 25 </Td> </Tr> <Tr> <Th_colspan="2"> Current uniform </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Colors </Th> <Td> Orange and Regalia </Td> </Tr> <Tr> <Th> Fight song </Th> <Td> Tiger Rag </Td> </Tr> <Tr> <Th> Mascot </Th> <Td> The Tiger </Td> </Tr> <Tr> <Th> Marching band </Th> <Td> Tiger Band </Td> </Tr> <Tr> <Th> Website </Th> <Td> ClemsonTigers.com </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Clemson Tigers football </Th> </Tr>

When did clemson win the national championship in football