Calvert Swimming, for girls, began in 1983. Led under the direction of Coach Sara Wax, the program became co-ed the following season (1984-85). Coach Wax led the program until 1991, when Mary Ann Kromer took over leadership of the program. Prior to that season, the North Central Ohio Swim League (NCOSL) was formed, consisting of Calvert, Bucyrus, Galion, Colonel Crawford, and Ontario. Coach Kromer led the program for three years before resigning from her post. The 1994-95 Seneca Swimmers welcomed Coach Janet Stover, who was successful in adding a Diving Team for the 1997-98 season.
In 2000, Nathan Coffman took over as the head swim coach, but would only remain in the post for 1 season. He was followed by Jeremy Dreger, who took over the team for 2001-02.
The 2002-03 Calvert Team only had three swimmers competing, and, therefore, did not fund a team. The three swimmers swam for SAC (Seneca Aquatic Club), which was coached by Peggy Ewald. In 2003-04, Calvert’s lone swimmer was Samantha Ritzler, and she was a state qualifier for three consecutive seasons (2004-07).
Joely Beeker took over as head coach in 2007, guiding the Senecas in conjunction with Tiffin Columbian. After Coach Beeker resigned following the 2008-09 season, Donna Hudacek guided the swimmers through the 2012-13 season. She was followed by Coach Tori Harris, who took over the program beginning in 2013-2014. Coach Harris is currently still leading the program.