Wagga are through to the first O'Farrell Cup final after sinking their CAW Hume demons.
Holbrook, who joined with Brocklesby to create the CAW Hume competition, had won the last two challenges against Wagga but the third time wasn't the charm at Robertson Oval on Sunday.
Ethan Perry led the way with 76 at the top of Wagga's innings as they stuttered their way to 190.
CAW Hume never looked likely chasing as Dave Garness tore through their top order.
Garness, who was only available after Wagga forfeited their Stribley Shield clash with Cootamundra, removed the first four Hume batsmen to set the tone.
However some late hitting from Joel Merkel and Clint Ralston added some respectability to the scoreboard as they added 92 runs for the final wicket before the side were bowled out for 155.
Despite having their rivals at 5-33 and then 9-63, captain Joel Robinson wasn't displeased with the effort.
"Generally you always get one partnership and the ball got old and the wicket was flat and they batted well at the end," Robinson said.
Perry was electric at the top of the order for Wagga, enjoying an 87-run opening stand with James Evans (28).
However after the Wagga RSL young gun was run out, Wagga struggled for momentum in the back half of their innings.
Ed Perryman did most of the damage, claiming 4-43 while Tom Simmons picked up two wickets.
"We were probably looking on target for 250 but lost a clump of wickets in the middle but it was probably the best I've seen Eth bat," Robinson said.
"He was really good, hit the ball well, hit the gaps and it was probably an unlucky way to get out in the end."
However Garness soon made up for any missed opportunities with the bat as he finished with 4-26.
Robinson was thrilled to have him come into the side late.
"He bowled very good and we took our chances," he said. "He's played Sloggers and it was a big in for us."
Simmons praised his team for fighting the match out.
"It's always disappointing to lose but Wagga is a good side," Simmons said.
"I was really happy holding them to 190 because they looked like making anything at 0-87.
"We lost early wickets in the chase though and it's hard to put your finger on what went wrong.
"I was pleased we didn't throw in the towel."
Wagga now travels to play CAW Provincial in the final next year.
Robinson is looking to win the cup back in the new format of the competition.
"We wanted to win here and I think the format is really good so hopefully the smaller towns can get behind in next year and make it a really good format," he said.