Case Lyman "Casey" Patten (May 7, 1874 – May 31, 1935) was a professional baseball player. He was a left-handed pitcher over parts of eight seasons (1901–1908) with the Washington Senators and Boston Red Sox. For his career, he compiled a 105–128 record in 270 appearances, with a 3.36 earned run average and 757 strikeouts.

Case Patten
Pitcher
Born: (1874-05-07)May 7, 1874 Westport, New York, U.S.
Died: May 31, 1935(1935-05-31) (aged 61) Rochester, New York, U.S.
Batted: Both Threw: Left
MLB debut
May 4, 1901, for the Washington Senators
Last MLB appearance
June 18, 1908, for the Boston Red Sox
MLB statistics
Pitching record	105–128
Earned run average	3.36
Strikeouts	757
Teams
Washington Senators (1901–1908) Boston Red Sox (1908)

In the history of the Washington/Minnesota franchise, Patten ranks tenth in wins (105), sixth in innings pitched (2059.3), tenth in games started (237), second in complete games (206), sixth in hits allowed (2146), and seventh in losses (127).

He was born in Westport, New York and later died in Rochester, New York at the age of 61.