Henry J. Prusoff (nicknamed "the Russian Bear";[1] December 10, 1912 – May 1943) was a top-ranked American tennis player in both singles and doubles in the 1930s.

[5] Prusoff won the singles and doubles titles at the Oregon State Tennis Championship in 1932.

[6] Prusoff also won the singles title and reached the doubles final at the Cincinnati Masters in 1934, and played in the US Championships where he was defeated in the round of 64 by John Van Ryn.

[2] In 1935, while ranked 13th in the United States and after defeating Sandy Davenport at the U.S. Championships in the round of 64 (but losing in the round of 32 to Frank Shields), Prusoff sustained a very bad, near-fatal back injury from which he nevertheless eventually made a surprising recovery.

[7][6][2] In both 1935 and 1939 he was nominated for the Seattle Post-Intelligencer Man of the Year sports award.