Waldo Ward "Rusty" Yarnall (October 22, 1902 – October 9, 1985) was a professional baseball pitcher. He appeared in one game in Major League Baseball for the Philadelphia Phillies in 1926. He was a right-handed thrower and batter. During his career, he was measured at 6 ft 0 in (1.83 m) in height and 175 lbs in weight. He attended Dartmouth College and the University of Vermont.