|Southern Ontario Junior Hockey League|
|Head Coach||Mike MacDonald|
|General Manager||Larry Brown|
|Arena||Queen Elizabeth Arena|
|Affiliate(s)||New Hamburg Firebirds, and Elmira Sugar Kings|
|Team Colors||Red, Black, Silver, White|
The Ayr Centennials were founded in 1982 as members of the Southern Junior D Hockey League.
In 1988, the Southern League merged with the Western Junior D Hockey League. In 1991, the Junior D rank was vacated and the league was replaced with the OHA Junior Development League. This league lasted up until 2006 when it was vacated and the Southern Ontario Junior Hockey League was created.
The Centennials had success in the Southern League but failed to win any league titles.
In the bloated Western League and Development League, the Centennials did exceptionally well but still failed to make a dent. In fact, despite finishing in the top ten teams of the league ten times in nineteen years, the Centennials never made the superleague's final once.
In the early-2000s, the Centennials lost their touch for winning. In the last year of the OHAJDL, they had their worst season ever, winning only 2 games in 36 tries and finishing dead last. But since joining the SOJHL in 2006, the Centennials have improved every season. In 2006-07 they finished 17th with 6 wins. In 2008-09 they finished 15th with 11 wins. In 2008-09 they really came together and had their best season in years, winning 18 games and finishing 7th.