The Warriors began as Brampton Regents during the 1940s playing at the Junior B level. In 1957, the team became sponsored by a local distributor of the 7 Up soft drink. The Brampton 7Ups played in the now defunct Metro Junior A League for two seasons, 1961–62 and 1962-63. Bob Savage was their coach for both seasons. The team returned to the Metro Junior B Hockey League in 1963.
The Brampton Warriors Jr. A team were an OPJHL team for two seasons in the 1980s. Their first season was not spectacular, but their second season was off the charts. Their 40-6-4 record would normally be unstoppable, however the Warriors finished second place in 1981-82 behind a 40-4-6 Guelph Platers team that would make the jump to the Ontario Hockey League the next season. As the Warriors folded for good at the end of the season, the Platers came within arm's reach of winning the National Title.
Three alumni of the Brampton 7Ups went on to play in the National Hockey League, all of them (Ken Broderick, Andy Brown, Lyle Carter) were goaltenders playing a combined total of 106 NHL games. Although Andy Brown played in just 62 games in the NHL over the course of three seasons, he will forever be a part of NHL hockey history. Brown carries the distinction of being the last goaltender in the league to play without a protective mask, now a mandatory rule.