Official Website of Dartmouth College Varsity Athletics



Year: Senior
Hometown: St. Louis, Mo.
High School: St. Louis University HS


Junior (2011-12): Participated at the Ivy League Championships ... Set a new school record in the 50 free with a time of 20.21, set during the 200 free relay ... Finished in seventh in the 50 free (20.23) ...  Took 14th in the 100 free (45.13) ... Member of the 400 free relay that placed eighth ... Swam on the record setting 200 medley relay ... 14th in the 100 butterfly (48.96) ... Swam on the 200 free and 400 medley relays which also set new school records ... Won the 100 fly against UConn (50.53) ... Against Cornell won the 50 free with a time of 21.02 ... Claimed the 100 fly title against Harvard/Cornell (49.71).

Sophomore (2010-11): Took fifth in the 100-fly with a time of 48.96 at the Ivy League Championships, his time of 48.66 in the prelims set a new Dartmouth record ... Member of the 400 medley relay team that took seventh place with a time of 3:20.28, which was a new team record ... Second place in the 50 free vs. Columbia with a time of 21.19 ... Won the 100 fly (50.10) and the 100 free (46.79) and 50 free (20.89) at the Dartmouth Invitational ... Member of the 200 free relay that took the top spot with a time of 1:24.85 ... Claimed the 100 fly title vs. Princeton (51.07) ... Won the 100 free against Harvard and Cornell (51.33).

Freshman (2009-10): Member of relay teams that placed first three times throughout the season ... Member of relay teams that took runner-up honor six times ...  Top finishes on the season included two runner up finishes and one third place finish in the 50 freestyle.

Before Dartmouth: Four-year member of the varsity swim team at St. Louis University ... Three-time Academic All-American ... First team All-Metro selection as a senior and a second team All-Metro selection as a junior ... Plans on a Pre-Med course of study.

Personal: Will is the son of Colin and Susan Derdeyn ... Has two brothers and one sister ... Father, Colin, swam for the University of Virginia from 1980-82.

Derdeyn's Top Times

Event Time
50-yard Freestyle
100-yard Freestyle 45.02
100-yard Butterfly

@-Dartmouth Varsity Record

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Interview: Men's Ivy Championship Preview, Feb. 20, 2018
Interview: Men's Ivy Championship Preview, Feb. 21, 2017
Interview: Men's Swimming and Diving Ivy Championship Preview, Feb. 25, 2016