David Wallace Heaverlo (/ˈhævərloʊ/ HAV-er-loh; born August 25, 1950) is a former right-handed Major League Baseball relief pitcher. His out pitch was a forkball. He is noted for shaving his head at a time when it wasn't popular and wearing a uniform number usually assigned to players not expected to make the major leagues coming out of spring training. In his career, he made 356 major league appearances, all as a relief pitcher. He pitched 537 career innings and earned 26 saves. His ERA was a respectable 3.41.