John Patrick Grabowski (January 7, 1900 – May 23, 1946), nicknamed "Nig", was an American baseball player.
He played professional baseball for 12 years from 1922 to 1933, including seven years as a catcher in Major League Baseball with the Chicago White Sox (1924–1926), New York Yankees (1927–1929), and Detroit Tigers (1931).
He was a member of the 1927 and 1928 New York Yankees teams that won consecutive World Series championships.