A varsity lacrosse player for three years, McEneaney earned First Team All-American honors at Cornell University in 1975, 1976 and 1977. (At this time, freshmen were not eligible for varsity lacrosse.) He was an attackman for Cornell's National Championship teams of 1976 and 1977, and Ivy League Championship teams of 1975, 1976 and 1977. McEneaney earned First Team All-Ivy honors in 1975, 1976 and 1977, and was selected Ivy League Player of the Year in 1975 and 1977. As the Big Red's MVP in 1975 and 1977, McEneaney ranks second on Cornell's all-time scoring list for career points with 256. He set NCAA tournament game records for assists, tournament points and game assists, and won the Brine Trophy as the MVP of the 1977 NCAA Lacrosse Championship game. In 1975, he received the Jack Turnbull Award as the Division I Attackman of the Year. In 1977, McEneaney earned the Lt. Raymond Enners Memorial Award as the Division I Player of the Year. A Cornell tri-captain, McEneaney represented Cornell in the 1977 North/South Collegiate All-Star game.

He played for the United States Team in the 1978 World Lacrosse Championships. In 1982, McEneaney was inducted to Cornell University's Athletic Hall of Fame.