<Table> <Tr> <Td> Home </Td> <Td> Away <P> </P> </Td> </Tr> </Table> <Tr> <Td> Home </Td> <Td> Away <P> </P> </Td> </Tr> <P> The Detroit Pistons are an American professional basketball team based in Detroit, Michigan . The Pistons compete in the National Basketball Association (NBA) as a member club of the league's Eastern Conference Central Division . The team plays its home games at Little Caesars Arena and was founded in Fort Wayne, Indiana as the Fort Wayne (Zollner) Pistons in 1941, a member of the National Basketball League (NBL). The Pistons joined the Basketball Association of America (BAA) in 1948 . In 1949, the NBL and BAA merged to become the NBA, and the Pistons became part of the merged league . Since moving to Detroit in 1957, the Pistons have won three NBA championships in 1989, 1990 and 2004 . </P> <P> The Detroit Pistons franchise was founded as the Fort Wayne Zollner Pistons, a National Basketball League (NBL) team, in Fort Wayne, Indiana . Owner Fred Zollner's Zollner Corporation was a foundry that manufactured pistons, primarily for car, truck, and locomotive engines . The Zollner Pistons were NBL champions in 1944 and 1945 . They also won the World Professional Basketball Tournament in 1944, 1945 and 1946 . </P>

What year did the pistons win their last championship