BEING drenched by someone else's beer at the footy isn't unusual.

But police have stepped in to investigate after beer was poured in a man's jacket hood during last month's AFL Grand Final.

Police said the "alleged criminal damage incident" occurred during the second half of the clash between Hawthorn and Fremantle.

The Greensborough man, 49, noticed what had happened only when he stood up and beer leaked out of his hood.

"I felt what I thought at the time was maybe somebody had spilt a little bit of beer on me or whatever when they kicked a goal and it turned out that I actually had my hoodie jacket on and clearly then they were obviously filling it up at some stage," the man, known as Bernard, told 3AW today.

"I felt a little bit come over my shoulder and looked around thinking someone had just accidentally stood up and got a bit excited. And then literally it started running down my shoulder and I couldn't quite work out what had happened, so when I stood up it went all over me."

Bernard said he was supporting Hawthorn on the day and there had been no animosity between him and the fans behind him.

Police have released an image of two Hawthorn supporters they wish to speak to about the incident. The photo came from a "selfie: that Bernard had taken early in the game.

He was sitting in row G in section Q29.

Anyone with information about the incident is asked to contact Crime Stoppers on 1800 333 000 or visit www.crimestoppers.com.au.

tom.minear@news.com.au