The Terriers (0-8) fell to the Bison (9-1) 123-103.
Essel won the 400-meter IM in 5:41.53 and the 100-meter breaststroke in 1:15.52.
Kost touched first in the 100-meter backstroke and 200-meter freestyle in 1:09.82 and 2:13.44, respectively.
Sophomore Jordan Canevari (Vero Beach, Fla./St. Edwards) was second in the 800-meter freestyle in 10:07.86 and was second in the 400-meter freestyle in 4:51.20.
Freshman Rylan Zeis (Newark/Granville) touched second in the 50-meter freestyle in 28.11 and was also second in the 100-meter backstroke in 1:14.53.
Freshman Jonathan Ruiz (Freeport, N.Y.) recorded a second place finish in the 100-meter butterfily with a time of 1:07.94.
Hiram will return to action on January 11, with a road contest at Wittenberg at 1 p.m.