The 1972 major league baseball season was originally scheduled to begin on April 5. The 1972 strike caused the season to see its first 10 days of games canceled, resulting in the season starting on April 15, while the regular season ended as originally scheduled on October 4. The postseason began on October 7. The 69th World Series began with Game 1 with the Oakland Athletics of the American League defeating the Cincinnati Reds of the National League, four games to three, capturing their sixth championship in franchise history, since their previous in Philadelphia in 1930. This was the first of three straight victories behind the bats of Reggie Jackson and Bert Campaneris, and the pitching cadre of Catfish Hunter, Rollie Fingers, and Vida Blue. Jackie Robinson, the player instrumental in breaking the AL and NL's color barrier, threw out the first pitch prior to Game 2 in what would be his last public appearance. He died two days after the series ended at age 53 due to complications from diabetes and heart failure. Going into the season, the defending World Series champions were the Pittsburgh Pirates from the 1971 season. The season was the first to have games canceled by a player strike. It was also the last season in which American League pitchers would hit for themselves on a regular basis; the designated hitter rule would go into effect the following season.