Bartholemew William Barclay "Bat" Masterson (November 26, 1853 – October 25, 1921) was a U.S. Army scout, lawman, professional gambler, and journalist known for his exploits in the 19th and early 20th-century American Old West. He was born to a working-class Irish family in Quebec, but he moved to the Western frontier as a young man and quickly distinguished himself as a buffalo hunter, civilian scout, and Indian fighter on the Great Plains. He later earned fame as a gunfighter and sheriff in Dodge City, Kansas, during which time he was involved in several notable shootouts.