Allansford's round 18 win was soured by injury with utility Dylan Hare re-breaking his collarbone in the final term.
The Cats finished their season with a 9.18 (72) to 6.5 (41) victory over Dennington at Dennington Recreation Reserve.
Allansford took the game in the second quarter, scoring 41 points to zero.
Coach Ben Price said Hare sustained the injury in a tackle.
The Cats mentor said the versatile player also broke his collarbone during pre-season.
Price said it was devastating because it was in the final quarter of the final match of the season.
Hare only played six matches this season after recovering from the original break.
Price said Hare was an integral part of the Cats' senior team.
The Cats coach said while it was disappointing to miss finals there was plenty to celebrate about the season.
"We have achieved some good goals within it," he said.
The Cats finished sixth after finishing seventh in 2018.
Meanwhile, South Rovers roared to a 31.8 (194) to 7.5 (47)win over East Warrnambool at Walter Oval.
Assistant coach Nathan Murphy said Matt McMillan played well in his 100th match.
Murphy said Josh Heard also sustained concussion during the game.
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