Sept 21 - The Cincinnati Reds and Washington Nationals became the first Major League Baseball teams to clinch playoff berths on Thursday, while the wild card races at the top of both the National and American Leagues continued to heat up. The Nationals (91-58) beat the Los Angeles Dodgers 4-1 to secure at least an NL wild card place and bring playoff baseball back to the U.S. capital for the first time since 1933 when the Washington Senators were playing in the World Series. ...