Peter Willits Burnside (July 2, 1930 – August 26, 2022) was an American professional baseball player and left-handed pitcher who appeared in 196 Major League Baseball games in 1955 and from 1957 to 1963 for the New York / San Francisco Giants, Detroit Tigers, Washington Senators and Baltimore Orioles. He was listed as 6 feet 2 inches (1.88 m) tall and 180 pounds (82 kg).