Frank Henry Mountain (May 17, 1860 – November 19, 1939) was an American baseball player from 1880 to 1886.

Over the course of seven major league seasons, Mountain compiled a 58-83 (.411) win–loss record and a 3.47 earned run average (ERA).

[5] Mountain began his professional baseball career in July 1880 with the Troy Trojans of the National League.

[1] In 1881, Mountain played for the Detroit Wolverines of the National League in the club's inaugural season.

After the 1884 season, Mountain, along with the entire Columbus team, was sold to the Pittsburgh Alleghenys.

However, an injury prevented Mountain from appearing in more than five games in 1885, and he compiled a 1-4 record and 4.30 ERA.

"[7] In November 1885, The Sporting Life noted that Mountain's "disability" was "a terrible disappointment to the club", rendering him unable to bat effectively despite having been a strong batter in 1884.

[1] One account reported that Mountain's arm was damaged by a "drop ball" pitch which was thrown in a motion bringing the arm above the head and then releasing the ball with a "sharp downward snap of the wrist.

[1] The following week, a newspaper account reported that his career as pitcher was over, a tryout with Pittsburgh having "proved a jonah.

[2][15][16][17] In approximately 1895, Mountain became a clerk for General Electric Company in Schenectady, New York.