The Fergus Green Machine were founded in 1971 in the South-Central Junior D Hockey League. In 1973, the league was promoted to the Central Ontario Junior C Hockey League. In 1979-80, while in the Northern, the Green Machine picked up a 16-year-old Scottish defenseman named
James Stephen Smith. Smith led the team to a league championship, and all the way to the Ontario Hockey Association Cup final against the
Belmont Bombers of the
Western Ontario Junior D Hockey League. The Bombers knocked off the Machine 2-games-to-none in a best-of-3 series to win the All-Ontario championship. Smith went on to play three seasons of
Ontario Hockey League hockey with the
London Knights before eventually winning three
Stanley Cups with the
National Hockey League's
Edmonton Oilers. In 1987 the Green Machine folded. In 1990, the town of Fergus resurrected the team as the Fergus Devils. Still in the Mid-Ontario Junior C Hockey League, the Devils played two seasons of interlock with the
Western Junior C Hockey League. Two years later, the Mid-Ontario merged with the Georgian Bay Junior C Hockey League to form the
Georgian Mid-Ontario Junior C Hockey League. It is unknown if the Devils won any Mid-Ontario championships. The Devils found their niche in the new league and won the league title in 1995, 1999, 2000, and 2001. The Devils have never reached the
Clarence Schmalz Cup finals. In 2006-07, a late season surge saw the Fergus Devils surpass the
Alliston Hornets and
Penetang Kings to gain the top seed in the league. As the
Bradford Bulls had left the league to try their chances on an Independent Junior A league, the Devils received a bye in the league quarter-finals. The well rested Devils took on the fifth seeded
Stayner Siskins in the league semi-final and beat them 4-games-to-1. Again in the finals, the Devils again faced the
Penetang Kings. The Kings went up 2-games-to-none on the Devils with a pair of double overtime victories. The Devils came back ane won game 3 and 4 just to lose game 5 and 6. For the second straight year the Penetang Kings beat the Devils for the league title and again went on to win the
Clarence Schmalz Cup. The Devils folded following the 2014/15 season. Prior to the start of the 2023-24 Provincial Junior Hockey League season, Jason Baier secured a new franchise and introduced the Fergus Whalers. The team competed in the North Conference and the Pollock Division. ==Season-by-season standings==