Melvin Frederick Nelson (born May 30, 1936) is a retired American professional baseball player and scout. A left-handed pitcher, the native of San Diego, California, appeared in 93 games, 82 in relief, over six seasons in Major League Baseball for the St. Louis Cardinals, Los Angeles Angels and Minnesota Twins. He was listed as 6 feet (1.8 m) tall and 185 pounds (84 kg). After retiring from the field, Nelson then scouted for the Cardinals and other MLB clubs.