Louis Americo Polli (July 9, 1901 – December 19, 2000), nicknamed "Crip", was an Italian-born professional baseball relief pitcher.

Polli first played in the majors with the St. Louis Browns in 1932, pitching 62⁄3 innings with a 5.40 earned run average.

Polli would not play again in the major-leagues until 1944, a period of 12 seasons, when he pitched 352⁄3 innings for the New York Giants, with a 4.54 earned run average.

Polli compiled a career minor league lifetime mark of 236–226 through 22 seasons.

[1] At the time of his death in 2000, aged 99, Polli was the oldest living former MLB player.