The Thundercats date back to the town's Centennial, 1972, and have been an extremely successful team in all loops of the Western Ontario Athletic Association Senior "AA" Hockey League.

The 72's were challenged by the Intermediate "C" Champion Lion's Head Northstars for the WOAA Grand Championship and lost a hard-fought battle that would lay the ground work for a tumultuous rivalry that would last for years to come.

Over the course of the next three seasons, Durham would endure successes but fall short of the ultimate goal, including the 1981 defeat at the hands of the Mitchell Red Devils, in the Intermediate "B" final.

Changes in the league format proved to be a good thing for Durham as in 1982, the 72's won their first ever Intermediate "A" Championship, beating Lions Head in seven games.

Led by the League's leading scorer in Randy '12' Reay, the 7th and final game was played in Markdale, in front of a sold out crowd.

With new coach Dennis 'Guido' Graham now calling the shots, the 72's moved to the newly formed Northern division with Lucknow, Ripley, Kincardine, Teeswater, and Lion's Head.

Solid goaltending from Scott MacMillan, Mark Taylor & Gord McGinnis, along with the 90pt seasons from Steve Reay and Todd Stoddart, they would defeat the Lucknow Lancers to win the Intermediate Grand Championship in their first year.

A hard-fought series ended when Brian Sweeney would score in overtime in the 6th game and allow the Thundercats to emerge victorious and Senior A Champions.

Some members of the team took immediate vacations but halfway through they got word that the WOAA had been attempting to contact them to set up dates for a Grand Championship series with the Arthur Tigers, the Intermediate "B" champions.

This resulted in the Cats losing the services of a couple of players for the last two games, due to prearranged trip commitments to Florida.

Prior to the 1999-00 season, the Thundercats engaged in a two-game home-and-home series against the Ontario Hockey Association's Senior AAA Cambridge Hornets.

[1] Such a matchup between WOAA and OHA senior teams was not seen again until September 30, 2017 when the Clinton Radars defeated the Whitby Dunlops 3-2 in a preseason game.

With future Mayor Kevin Eccles now behind the bench, the T-Cat's would knocked off the Hensall Sherwoods to win the Senior "AA" crown in 01', but would lose to Milverton in 02'.

In 2003/04, the Thundercats, with Reed behind the bench again, would plough their way through the regular season and then carry-on to win another Senior "AA" championship, defeating the Clinton Radars in the league final.

For playing Neil without league permission, the win was taken away and awarded to Mildmay and Durham's coach Rob Reed was suspended.

Without the ability to play with his brothers, Neil soon shipped off to the American Hockey League's Binghamton Senators, and they T-Cats were unable to duplicate the success of the previous year.

With Reed in the assistant coach's role, Antonopolis weaved his magic and once again the T-Cats were providing Durham fans with the kind of hockey they were used to seeing in the 1990s.