William Harvey Maddren (August 3, 1875 – January 8, 1909) was an American lacrosse coach and physician.
[1] Maddren then studied medicine at Johns Hopkins University and received a medical doctorate in 1901.
[1] Maddren played lacrosse at Hopkins from 1897 to 1901, and in his first year there, was elected team captain and appointed as its player-coach.
[2] In May 1904, Maddren returned to Baltimore to attend a medical clinic at Johns Hopkins Hospital, and while there, also served as an assistant coach to Charles MacInnes for the game against Swarthmore College.
[3] Alexander M. Weyand and Milton R. Roberts wrote in The Lacrosse Story that Maddren's efforts were largely responsible for "convert[ing] sedate Baltimore into a seething hotbed of lacrosse enthusiasm, the like of which had never been seen elsewhere in the United States.