Complex sentence: The World Series series victory for the Oakland Athletics was the first for the franchise in 42 years since the days of Connie Mack when the team was in Philadelphia 1930 and ensured manager Dick Williams' return for another year.
Split into simpler sentences: The World Series series victory for the Oakland Athletics was the first for the franchise in 42 years since the days of Connie Mack when the team was in Philadelphia and had won in1930. The victory ensured manager Dick Williams' return for another year.