Clifton Garfield Curtis (July 3, 1881 – April 23, 1943) was an American pitcher in Major League Baseball.

While pitching for the last-place Boston Doves (later known as the Rustlers, and later still as the Braves) in 1910 and 1911, Curtis set a record of 23 consecutive losses.

[2] The record was eventually broken in 1993, when New York Mets pitcher Anthony Young lost 27 consecutive games in which he had a decision.

[3] During his lengthy losing streak, Curtis also failed to pick up a win in 28 consecutive starts, which also established a Major League record.

This record was tied by Matt Keough (1978–79) and Jo-Jo Reyes (2008–2011), but to date it has not been broken.