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Doc Prothro
Doc Prothro
	Prothro with the Memphis Chicks in 1924
	Third baseman / Manager
	Born: July 16, 1893; Memphis, Tennessee, U.S.
	Died: October 14, 1971 (aged 78); Memphis, Tennessee, U.S.
	Batted: Right Threw: Right
MLB debut
	September 26, 1920, for the Washington Senators
Last MLB appearance
	September 24, 1926, for the Cincinnati Reds
MLB statistics
Batting average	.318
Home runs	0
Runs batted in	81
Managerial record	138–320
Winning %	.301
	Stats at Baseball Reference
Teams
	As player Washington Senators (1920, 1923–1924); Boston Red Sox (1925); Cincinnati Reds (1926); As manager Philadelphia Phillies (1939–1941);

James Thompson "Doc" Prothro Sr. (July 16, 1893 – October 14, 1971) was an American infielder and manager in Major League Baseball (MLB). Prothro was so nicknamed because he was a practicing dentist before signing his first professional baseball contract at age 26.^[1] After playing five seasons in MLB, Prothro became a manager, compiling what remains the worst career winning percentage among major league managers.

Career

As a player, Prothro was discovered by baseball promoter Joe Engel, who managed the Chattanooga Lookouts at Engel Stadium.^[1] Prothro played in the major leagues as a right-handed hitting third baseman and shortstop for the Washington Senators, Boston Red Sox and Cincinnati Reds (1920; 1923–26), batting .318 with no home runs and 81 RBI in 180 games.^[2]

In 1928, Prothro became a manager in the Southern Association (SA), then one of the higher-level minor leagues, leading the Memphis Chicks and Little Rock Travelers to four SA pennants through 1938.

In 1939, Prothro replaced Jimmie Wilson as manager of the Philadelphia Phillies. In his three full seasons (1939–1941) at the helm of the Phillies, the club remained locked in the National League cellar — losers of 106, 103 and 111 games. Prothro's career mark of 138–320 has the lowest managerial winning percentage, .301, in major league history.^[3]^[a]

Prothro was fired after the 1941 season and replaced by Hans Lobert and thereafter returned to the Southern Association, where he piloted the Chicks from 1942 to 1947. After he retired as Memphis' manager, he remained active as a co-owner of the club.