Albert Benjamin "Happy" Chandler Sr. was an American politician from Kentucky. He represented Kentucky in the U.S. Senate and served as its 44th and 49th governor. Aside from his political positions, he also served as the second Commissioner of Baseball from 1945 to 1951 and was inducted into the Baseball Hall of Fame in 1982. His grandson, Ben Chandler, later served as congressman for Kentucky's Sixth District.

The Commissioner of Baseball is the chief executive officer of Major League Baseball (MLB) and the associated Minor League Baseball (MiLB) – a constellation of leagues and clubs known as "organized baseball". Under the direction of the Commissioner, the Office of the Commissioner of Baseball hires and maintains the sport's umpiring crews, and negotiates marketing, labor, and television contracts. The commissioner is chosen by a vote of the owners of the teams. The incumbent MLB commissioner is Rob Manfred, who assumed office on January 25, 2015.