Youngest Kyle will take up his fullback role for the Tathra Sea Eagles, while big brothers Josh and Shannon hit the park for the Bega Roosters.

The passionate rivalry between the two neighbouring towns comes to a head in Sunday's Group 16 Rugby league decider, the first time the two sides have faced each other in a first grade grand final since 2001.

"It's a weird feeling playing against them, but you always want to get one up on them," Kyle said.

And while Mum might have to wear two jumpers, one is a bit closer to home.

"Mum wouldn't like me to say it, but I think she wants Tathra to win," Kyle added with a laugh.

Shannon agreed that the three brothers split across two clubs does make it a bit of a challenge.

"It's a challenge that's for sure, it's hard on Mum," he beamed.

"It's a strange thing to play against each other, but it's fun, Kyle has his job to do and I have mine."

The trio grew up together in Tathra playing backyard footy, to the point they can almost read each others' minds.

"Sometimes it can feel like we are twins [Josh and I]," said Shannon. "I know what he is thinking and he can read what I am thinking so it just works out."

Kyle agrees to disagree.

"I do get the sense of what they're up to, I always try to read what Josh is going to do [with his kicking game] and try to talk him out of it - no-one knows what Shannon is going to do," he said with a laugh.

Speaking of mind-reading, all three agreed Ryan Apps is the man on task for Bega, while Malcolm Green out of Tathra gets the nod as a big-game player.

The youngest of the three, Kyle is renowned for his speed and stepping abilities and said he will avoid running into his brothers on Sunday.

"I try and run away from them to be honest, I prefer avoiding them if I can."

But the older pair see it differently.

"If I know he's coming my way I want to make sure I get my hands on him, because I know if he gets past he'll drag me for it," Shannon said with a laugh.

Shannon said it can be weird for Josh and himself to hit up against former club-mates, but credited coach Scott Barton with bringing them into the fold through touch football and then two dominant seasons in reserve grade.

"Doesn't matter what the jersey is, I'm playing for the blokes on my team to get the job done," he said.

However, the trio said they are very close and will be quick to share a beer after the game.

See more from the Group 16 grand finals pages 28, 29 and 30