But the trio aren't just celebrating the triumph of one premiership, having won grand finals for two rugby league clubs in the one season.

The boys played for Cabramatta in the Parramatta District Junior Rugby League on Saturday and strapped the boots back on Sunday for the Our Lady of Mount Carmel Sharks in the Parramatta District Catholic Convents competition.

For Cabramatta, the boys went through the season undefeated and clinched the under-10 division one premiership with an emphatic 24-0 grand final win against Hills District.

In the Sunday competition, it was Our Lady of Mount Carmel who upset minor premiers Our Lady Queen of Peace, Greystanes, in the decider.

Greystanes and the Sharks had fought out two draws during the season before OLQP defeated the Sharks in the major semi-final.

But the Sharks were out for revenge in the grand final and ended their opponents' season-long undefeated streak with a 24-18 victory, making amends for the club's grand final loss to Greystanes 12 months earlier.

The grand finals marked the end of a year which saw the boys train three nights and play two days each week.