Entenmann was an honorable mention All-American and an honorable mention All-Ivy selection in 1985. He served as team captain as a senior and following the season he was selected to participate in the North-South All-Star Game. Entenmann won the team’s Charlie Hustle Award three times, as well as the Al “Junior” Kelz-Mike Herriott Award as the outstanding senior player, the Lawrence Van Buren Woodworth Memorial Award, given to the player who most exemplifies competitive spirit and fair play, and the C.F. Morse Lacrosse Scholar-Athlete of the Year, given annually to the lacrosse player who combines best the physical attributes of the Spartan and the scholastic achievement of the Athenian. He played in 49 career games and finished his career with 39 goals, 37 assists and 213 ground balls.