A. Bartlett Giamatti, American businessman and academic (b. 1938)
Angelo Bartlett Giamatti (; April 4, 1938 – September 1, 1989) was an American professor of English Renaissance literature, the president of Yale University, and the seventh Commissioner of Major League Baseball.

Giamatti served as Commissioner for only five months before dying suddenly of a heart attack. He is the shortest-tenured baseball commissioner in the sport's history and the only holder of the office not to preside over a full Major League Baseball season. Giamatti negotiated the agreement resolving the Pete Rose betting scandal by permitting Rose to voluntarily withdraw from the sport to avoid further punishment.