Gregg won soccer letters in 1978, 1980, 1981 and 1982; Co-captain in 1982; All-Big Ten in 1981 and 1982. Gregg was a member of the 1982 NCAA championship team; scored both goals in IU's 2-1, eight-overtime win over Duke. Gregg was a member of 1984 U.S. Olympic team, and a member of the U.S. National Team 1984-1986.