John August Antonelli (April 12, 1930 – February 28, 2020) was an American professional baseball player, a left-handed starting pitcher who played for the Boston and Milwaukee Braves, New York and San Francisco Giants, and Cleveland Indians between 1948 and 1961. Noted at the outset of his pro career as the recipient of the biggest bonus in baseball history when he signed with the Braves for $52,000 in 1948, he later became a six-time National League All-Star, a two-time 20-game-winner, and an important member of the 1954 World Series champion Giants' pitching staff. He batted left-handed, stood 6 feet 1 inch (1.85 m) tall and weighed 185 pounds (84 kg).