Thomas H. "Pat" Deasley (November 17, 1857 – April 1, 1943) was a 19th-century professional baseball player. Deasley primarily played catcher during his eight-year career from 1881 to 1888. Deasley played for the Boston Red Stockings, St. Louis Browns, New York Giants, and Washington Nationals over the course of his career.

Pat Deasley
1887 baseball card of Deasley
Catcher
Born: (1857-11-17)November 17, 1857 Philadelphia, Pennsylvania, US
Died: April 1, 1943(1943-04-01) (aged 85) Philadelphia, Pennsylvania, US
Batted: Right Threw: Right
MLB debut
May 18, 1881, for the Boston Red Stockings
Last MLB appearance
September 12, 1888, for the Washington Nationals
MLB statistics
Batting average	.244
Home runs	0
Runs batted in	120
Teams
Boston Red Stockings (1881–1882) St. Louis Browns (1883–1884) New York Giants (1885–1887) Washington Nationals (1888)

He died on April 1, 1943, in Philadelphia, Pennsylvania, and is interred at the Mount Moriah Cemetery.^[1]