The command pennant is two triangular command pennants used in the RAF. Colored pennants and ribbons could also be used alongside flags. Individual chapters may also purchase and use pennants and wall banners of various designs. The Dodgers have won six World Series championships and twenty three National League pennants. Black became the colour for garments, flags, pennants. The Orioles won three consecutive American League pennants between 1969 and 1971. The Vernon Tigers won three consecutive league pennants. The Yankees won three straight pennants with Hunter from 1976 to 1978. He was the catcher for two Astros teams that won division pennants. Riverfront saw three World Series titles and five National League pennants. Both teams won three consecutive pennants and two of three World Series. They made nine playoff appearances and won three NL pennants between 1958 and 2009. By 1957, the Yankees had won 15 of the last 21 AL pennants. He led the team to six National League pennants in the 1880s. Jim Leyland is the seventh manager to win pennants in both leagues.