The "Big M" was Frank Mahovlich.
Walter Johnson
corliss williamson
Glen Robinson
Oscar Robertson, Hall of Fame guard for the Royals and Bucks between 1960-1974, went by the nickname of Big O.
Andres Galarraga, first baseman for several teams between 1985-2004, was known as the Big Cat.
Big Country was the nickname for Bryant Reeves.
Hall of Famer Elvin Hayes, who played for the Rockets and Bullets between 1968-1984, went by the nickname of Big E. Or as we used to yell when he would hit one of those 14 foot turn around jumpers, EEEEEEEEEEEEEEEEEEEEEEE.
Ronald Glen Davis, a professional basketball player forward with the Orlando Magic has the nickname "Big Baby".
Wilt Chamberlain
david ortiz
Dave Cowens