Marcus Elmore Baldwin (October 29, 1863 – November 10, 1929), nicknamed "Fido" and "Baldy", was an American right-handed professional baseball pitcher who played seven seasons in Major League Baseball (MLB). In 346 career games, he pitched to a 154–165 win–loss record with 295 complete games. Baldwin set the single-season MLB wild pitches record with 83 that still stands today.