As coach Randal Harold Niemann (born November 15, 1955) is an American professional baseball coach and a former pitcher who appeared in 122 Major League games, all but 10 in relief, in 1979–80 and 1982–87 for the Houston Astros, Pittsburgh Pirates, Chicago White Sox, New York Mets and Minnesota Twins.

[1] Born in Scotia, California, Niemann attended Fortuna Union High School then College of the Redwoods.

Niemann originally signed with the New York Yankees after he was selected in the second round of the secondary phase of the 1975 Major League Baseball Draft, and his active career spanned 14 pro seasons (1975–88).

In the Major Leagues, he worked in 200 innings pitched, and allowed 219 hits and 82 bases on balls, with 102 strikeouts, three saves and three complete games.

[2] On August 20, 2012, he was named Boston's head pitching coach and served through the end of the season, but was not retained by Valentine's successor, John Farrell.