A steady stay-at-home defender, Guy played his junior hockey with the Medicine Hat Tigers and was selected 71st overall by the Flames in the 1983 NHL Entry Draft.
He signed with the Flames and turned pro in 1985, and made his NHL debut in the 1986–87 appearing in 24 games and recording 4 assists.
He spent his first full season in the NHL, appearing in 45 games for the Canucks and recording his first two career goals along with two assists.
Guy spent most of the next three seasons with the Salt Lake Golden Eagles, Calgary's minor-pro affiliate, appearing in just 3 games for the Flames in 1991–92.
Guy is currently part of the coaching staff for the Utah Valley University men's ice hockey team.