Frederick "Firpo" Marberry (November 30, 1898 – June 30, 1976) was an American right-handed starting and relief pitcher in Major League Baseball from 1923 to 1936, most notably with the Washington Senators.

Marberry's role was crucial in helping the Senators reach the World Series for the first time in franchise history.

The next day, Marberry started Game 3 at the Polo Grounds, but allowed two unearned runs in the second inning, was pulled for a pinch hitter in the top of the fourth while trailing 3–1, and was charged with the loss.

He rebounded in Game 4 the next day, however, entering in the eighth inning with a 7–2 lead and closing out the victory to again tie the Series.

In Game 7 at Griffith Stadium, Marberry entered with two men on base and no one out in the sixth inning, leading 1–0.

In 1931, showcasing his talents as both a starter (25 starts), and a reliever (20 appearances), he posted a 16–4 record with a 3.45 ERA (fifth in the league) and 88 strikeouts.

While he recorded 11 complete games and one shutout as a starter, he also had seven saves, and finished 13th in MVP voting (Lefty Grove won the award).

[2] He made a single relief appearance for the Giants in 1936 before ending his career on June 10 in Washington, D.C. On May 6, 1934, Marberry allowed a record-tying four consecutive triples to the Boston Red Sox.