Members of this league included the Bothwell Barons, Durham Huskies, Lucan-Ilderton Jets, London Kings, Preston Jesters, and Stratford Perths.
The Chatham Maroons, New Hamburg Screaming Eagles, Petrolia Squires, and Port Stanley Dynamiters joined the league.
Champions Finalists Champions Durham vs. Lucan-Ilderton Prior to the creation of the Western Senior B league, the Durham Huskies and Lucan-Ilderton Jets had a healthy rivalry running in the various Ontario Hockey Association Intermediate leagues.
In 1971-72, the Jets pulled out of the Southern Counties Intermediate B league in favour of running an independent schedule.
The Jets had made wind about challenging for the Allan Cup in 1972, but their bravado was squashed by the OHA Champion Napanee Comets.
The Western Senior B league was virtually built around the Huskies and Jets and the two teams dominated the first four years of its existence.
The one common denominator between the two teams was their need to squash the Stratford Perths in the league final each year.
After this, the OHA allowed the Jets to challenge for an Allan Cup spot, but they were squashed by the Barrie Flyers 4-games-to-none.
After five seasons of domination, in 1984 the Mott Clamatos and the Tigers took Petrolia and Cambridge's spot in the league final.
After the season, the league dropped from seven teams to three and were forced to bring in the Thunder Bay Twins as a fourth member.
Brantford went on to win the Allan Cup that year, only to have their sponsor back out and the team fold at the end of the season.
The folding of Dundas and Brantford at the end of the season started a chain reaction of events in Ontario hockey.