Dion was a consistent producer from the blueline for the Terriers for parts of five seasons. During his first two years with the team, Dion led the defense in scoring but BU didn't have much success team-wise. He played on
Team USA at the
1989 World Junior Championships along with future
NHL stars like
Jeremy Roenick and
Mike Modano. Despite the talent on the team, the US finished 5th with a .500 record. During what was to be his junior season, Dion was felled by a season-ending injury after just 3 games and sat out the remainder of the year with a
medical redshirt. In his absence, the Terriers went on a surprising run in the
1990 NCAA Tournament, reaching the Frozen Four. When he returned, the Terriers improved upon their record from the year before and won the
Hockey East championship. The Terriers received the second eastern seed and dominated in their first three national tournament games to make the
1991 NCAA championship game. Dion had led a defense that had surrendered just 5 goals to that point so when the team took a 3–0 lead after the first period everything pointed to BU winning the title. Unfortunately for Dion,
Northern Michigan had one of the strongest offenses in NCAA history and the Wildcats scored 6 goals in just over a period to take a commanding lead. Boston University charged back and eventually tied the game, forcing overtime. Three extra periods were needed but in the end BU ended up on the wrong side of the score and Dion was denied a championship. For his senior season, Dion was named
team captain and led the Terriers to an excellent record in the regular season. Dion was one of the key contributors in BU's third consecutive
Beanpot championship. With all signs pointing to the Terriers competing for another championship, the team collapsed in the playoffs. The Terriers were beaten by long-time rival
Boston College in the conference quarterfinals, causing the team to receive a 4th-seed for the
NCAA Tournament. Boston University received a poor draw for the first round and lost to
Michigan State in their only game. Dion signed a professional contract after the season, playing the following year with the
Wheeling Thunderbirds. Despite posting good numbers for a first-year pro, he decided to retire after the year. ==Statistics==