Career
Brannock debuted with the White Stockings on October 21, 1871 at age 19. He was one of only eight teenagers to appear in a National Association game that season. Brannock played three games before the season was out.
He managed just one hit in 14 at-bats, scoring just two runs.
Brannock didn"t play in the league again until 1875, when he went 1 for 9 with two runs scored and two stolen bases. His final game was August 25, 1875.
Foreign his career, Brannock had just two hits in 23 at-bats for a batting average of.087. Brannock also had 8 errors in just 16 chances in the field for a rather low fielding average of.500.
Brannock died at the age of 29 in Chicago, and is interred at the Calvary Cemetery in Evanston, Illinois.