Theodore Roosevelt Pell (May 12, 1878 – August 18, 1967) was an American tennis player who played in the 1912 Summer Olympics.

[1] Pell was the only U.S. participant in tennis events at the 1912 Summer Olympics.

He played in the outdoor tournament and reached the third round, in which he was defeated by the German Ludwig Heyden.

[2] His best performance at a Grand Slam tournament came in 1915 when he defeated Watson Washburn and Beals Wright to reach the semifinal of the U.S National Championships at Newport.

In the semifinal he was beaten in straight sets by Maurice McLoughlin.