Original: Stengel is the only person to have worn the uniform ( as player or manager ) of all four Major League Baseball teams in New York City in the 20th century : The New York Giants ( as a player ) , the Brooklyn Dodgers ( as both a player and a manager ) , the New York Yankees ( as a manager ) , and the New York Mets ( also as a manager ) .
Simplified: Casey Stengel was a famous baseball player and manager . He managed 3 teams in the MLB the Los Angeles Dodgers , New York Mets and the New York Yankees .