He played for the Rebels, Tri-City Americans, and Calgary Hitmen before starting his professional hockey career in 2000 with the Portland Pirates.

[9] While he was originally projected as a top ten National Hockey League (NHL) draft pick, Peat's regression during his sophomore season caused his prospects to drop.

[14] After failing to live up to expectations in Red Deer, the Rebels traded him to the Tri-City Americans in January, receiving defenceman Regan Darby and winger Jarrett Thompson in exchange.

[17] Peat played 12 games with the Americans during the 1999–00 season, with two assists and 48 penalty minutes, before he was traded to the Calgary Hitmen in December.

[19] In June 2000, the Mighty Ducks traded him to the Washington Capitals in exchange for a fourth-round pick in the 2000 NHL Entry Draft,[20] and he signed with the organization shortly thereafter.

[24] Peat made his NHL debut on October 8, 2001, playing 3 minutes and 54 seconds in the Capitals' 4–0 loss to the Boston Bruins.

[30] Peat's last professional hockey appearance was one game with the Albany River Rats, the New Jersey Devils' AHL affiliate, during the 2006–07 season.

He was released from Foothills Medical Centre the next morning and a man was charged with assault with a deadly weapon and three counts of being unlawfully at large.

[33] On March 17, 2015, Peat set down a blowtorch in his father's garage, which burned a hole in a nearby mattress, creating a fire that destroyed the house.

[30][38] He continued to experience headaches, memory loss, and impaired focus, which he attributed to brain injuries received during his career as an enforcer.