Junior Chris Inglis broke his own school and A-10 record with a time of 1:36.80.
Josh Koppel and Alexander Merkulov took the second and third spots in the one-meter dive.
Day two opens with prelims at 10:30 a.m., finals begin at 6:30 p.m.
UMass will see the Rams again in three weeks at the Atlantic 10 Championships.
Dartmouth holds a commanding lead on both the men's and women's sides.
2012-2013 (Junior): Won first place in the 200 Medley Relay (1:35.51) and second in the 100 Backstroke (53.27) at Fordham (2/2) ... Helped the Medley Relay team finish third with a time of (1:34.56) at Bryant (1/19) ... Placed second at the Terrier Invitational (11/16-18) in the
100-yard Backstroke (50.62) ... Received second place in the 100 Backstroke (51.92) at Brown (11/10).
2011-12 (Sophomore): Finished fourth in the 50 Yard Freestyle (21.87), second in the 400 Yard Freestyle Relay (3:11.36), first in the 200 Yard Medley Relay (1:35.18), and fourth in the 100 Yard Backstroke (52.91) against Boston University (10/15).
Before UMass: Three year letter winner at Hingham High school for Coach Kait McDonough.
Personal: Colin James Mulcahy ... Son of Dudley and Carolyn Mulcahy ... Brother of Megan and Lily ... Majoring in Actuarial Sciences.