The Oakland Athletics are a Major League Baseball team based in Oakland , California . The team is often called the A's. The team was founded in the year 1901. The Oakland Athletics have been known as Philadelphia Athletics (1901-1954), Kansas City Athletics (1955-1966). The session 1968 was the first regular season in 46 years as they won their first season after 16 years with a record of 82-80. After another second-place finish in 1970, the A's won the A.L. West title in 1971, only to lose to the Baltimore Orioles in the American League Championship Series. The Athletics won World Series championships in 1972, 1973 and 1974. Oakland won five consecutive division titles from1971 to 1975.Oakland Athletics Jerseys