Edwin William Leishman (December 20, 1910 — December 28, 1972) was an American professional baseball player, manager and executive. He was the first general manager of the San Diego Padres when they joined Major League Baseball, serving from late 1968 until 1972. Immediately before, Leishman had been the GM of the Triple-A, Pacific Coast League edition of the Padres from 1960 to 1968.