Inducted as a truly great player, Mary played coverpoint at Swarthmore High School from 1944-46, and was captain of the undefeated 1946 team. After attending Temple University, where there was no lacrosse team, she began playing lacrosse for the Philadelphia Women's Lacrosse Association. She played for the Philadelphia WLA from 1951-1961. She was a member of the U.S. squad traveling to Great Britain and Ireland as a player on 1957 U.S. Touring Team. She was selected to play for the U.S. squad for 10 years and was chosen captain of the 1961 U.S. team. During that time she was also selected First Team U.S. Hockey for three years.
Mary coached for 22 years at Drexel University and three years at Beaver College. She also coached the Philadelphia and U.S. squads. She was a national lacrosse umpire for 25 years. Mary has served on many USWLA and PWLA committees throughout the 1950's and 1960's. She is honorary member of the USWLA and has been inducted to the Temple University, Drexel University and Pennsylvania Sports Halls of Fame.
Mary Semanik passed away in February 2016.