Even more uncommon is the chance to celebrate a birthday on the day a club adds silverware to its coffers.

But Josh Rentsch is hoping he's one of the lucky ones.

The star forward, who turns 16 on Saturday, is hoping to blow out the candles on a stellar year by helping Penshurst to a premiership victory over Great Western at Lake Bolac.

"I'm feeling pretty nervous, with the birthday and grand final. Hopefully I can come in calm and have a good win," Rentsch told The Standard.

Rentsch has juggled duties with NAB League outfit Greater Western Victoria Rebels and Penshurst this season.

He's been a welcome presence in the Bombers' forward line, slotting 21 goals from just seven games at Mininera league level.

"It's good to come back and play with the boys. I know everyone very well and I'm comfortable with everyone," Rentsch said.

"Fitness is going to be important for us (in the grand final) and making them tired early so we can just run over the top of them."

Rentsch was unsure of his future.

"I don't know where I'll be next year - I might be back with the Rebels," he said.

"It'd be good to get this one here."

Penshurst coach Justin Eales said Rentsch had a bright future in the game.

"I've seen a lot of kids come through in my time," Eales said.

"You look at kids who they talk about getting drafted and going further and I think Josh has the most chance of any.

"That's purely because of the fact they love raw, natural athletes. They think they can make them into footballers."

Eales said Rentsch's size and skills held him in good stead.

"He's got the height and you try to beat him in a 400 or 800 metre and he runs like a gazelle," he said.

"He's a one-grab mark and he has all the attributes."

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