<P> The first professional hockey rivalry between the two cities dates to the founding of the Western Canada Hockey League in 1921 . Both cities received teams, Calgary the Tigers, and Edmonton the Eskimos . The Eskimos won the WCHL title in 1923, but lost the Stanley Cup to the rival National Hockey League's Ottawa Senators . Calgary also appeared in a Stanley Cup championship series in 1924, but lost to the Montreal Canadiens of the NHL . After the demise of the WCHL in 1927, Alberta hockey fans turned to junior hockey . Both cities had teams in the Western Hockey League and Alberta Junior Hockey League . </P> <P> Pro hockey did not return until the World Hockey Association arrived in 1972 . Both cities received teams, but Calgary's Broncos folded without playing a game . The new Edmonton Oilers, then were left without an intra-provincial rival until a new WHA team, the Calgary Cowboys arrived in 1975, but they folded in 1977 . The short and sporadic nature of the Calgary WHA franchises made building meaningful rivalries more difficult . The WHA itself was unstable and merged with the NHL in 1979 . </P> <Table> <Tr> <Td_colspan="2"> Flames--Oilers rivalry </Td> </Tr> <Tr> <Td_colspan="2"> <P> Eric Godard and Matt Greene fight during a game in 2008 . </P> </Td> </Tr> <Tr> <Td> Teams </Td> <Td> Calgary Flames Edmonton Oilers </Td> </Tr> <Tr> <Td> Originated </Td> <Td> 1980--81 NHL season </Td> </Tr> <Tr> <Td> Regular Season Record </Td> <Td> Calgary leads 117--100--18 (includes overtime and shoot - outs) </Td> </Tr> <Tr> <Td> Playoff Record </Td> <Td> Edmonton leads 4 series to 1 (19--11 in games) </Td> </Tr> </Table> <Tr> <Td_colspan="2"> Flames--Oilers rivalry </Td> </Tr>

When is the last time the flames beat the oilers