Steven Wayne Ratzer (born September 9, 1953) is an American former Major League Baseball (MLB) player pitching for the Montreal Expos in 1980 and 1981.

[4] He began playing immediately at the rookie league level, and by 1977 he had worked his way up to the Expos' AAA affiliate in the American Association, the Denver Bears, where he remained through the 1980 season.

[5] Ratzer made his Major League debut on the final day of the 1980 season[6] as the starting pitcher when the Expos hosted the Philadelphia Phillies.

[5] In between, Ratzer played winter ball with the Águilas del Zulia and Tiburones de La Guaira clubs of the Venezuelan Professional Baseball League during three seasons spanning 1978–1982.

[9] He also pitched for the Dominican Republic's Leones del Escogido in the winter of 1981, and in Game 9 of the 1982 Caribbean Series.