William F. Henley Buck was an American professional baseball player and umpire.

[2] He was a member of the Princeton University's Nassau Baseball Club first nine (starting lineup) in the 1866–67 season as a shortstop.

[3] The team was also known as the Pickwick Nine, playing under that name because the faculty refused to allow them to leave campus for some games.

[14] In October 1871, he played in a game which was arranged to as a benefit to support victims of the Great Chicago Fire.

[2] Buck died June 10, 1890, in Boston, Massachusetts[1][18] and was buried in Greenmount Cemetery in Baltimore.