The term 'Yankee Nickname' refers to the nicknames of three famous New York Yankees baseball players: YOGI (4 letters), DiMag (5 letters), and Arod (4 letters). YOGI Berra was a Hall of Fame catcher, known for his witty sayings. Joe DiMaggio was a legendary center fielder who had a 56-game hitting streak in 1941. Alex Rodriguez, or A-Rod, was a shortstop and third baseman who holds the record for most career grand slams.