John Phillips Jenkins "Count" Sensenderfer (December 28, 1847 – May 3, 1903) was a professional baseball player who played for the Philadelphia Athletics from 1866 to 1874.

John Phillip Jenkins Sensenderfer was born on December 28, 1847, in Philadelphia, Pennsylvania, to James, a carpenter, and his wife Mary.

[2][3][4] Sensenderfer joined the Athletic club at the age of eighteen in 1866, and "The Count" (he got the nickname from his moustache and aristocratic air) quickly became of the top players in the country.

Originally playing second base before moving to center field, Count was one of the first players to score two hundred runs in a season, for the championship Philadelphia team of 1868.

(Right fielder George Bechtel took Count's place in center, while Nate Berkenstock, a 40-year-old amateur retired from Athletic for five years, played right; it was his only big-league appearance.)