Northern Pirates ended the unbeaten season of Dapto Chiefs to be left as the only undefeated club following a 12-1 thumping at Hector Harvey Reserve.
Pirates followed up an impressive victory over premiers Wests Cardinals last week with Saturday's round-six demolition of the 2013 grand finalist Chiefs.
Pirates' Brendan Lower threw a complete eight innings for just three hits, with Chiefs' only run coming in the eighth dig.
Four Chiefs pitchers were all ineffective as Pirates out-hit the home side 17-3.
Pirates shortstop Lachlan Crawley went 2/3, with centre fielder Matt Sainsbury 3/6, including a triple and two RBIs.
Jared Commane (2/3) played a lone hand for a disappointing Chiefs.
In other results, new Berkeley recruit Jason Sloan, from Australian Baseball League franchise Canberra Cavalry, made an immediate impact with three hits, including a two-run homer, in a 13-6 away victory over Kiama Braves.
Kiama scored five runs in the fifth inning to lead 6-5 but Eagles scored eight runs in the final three innings for an impressive first win of the season.
Sloan went 3/5 and was supported by Shannon Crilly with 3/5, while Matt Sneddon and Doug Ineson had two hits each for Braves.
Eagles out-hit Braves 14-10, with Eagles starter Josh Doyle pitching into the fifth inning for only six hits and one earned run.
In the other match, Cardinals crushed Shoalhaven Mariners 11-1 at Cringila Park.
Cardinals player-coach Josh Dean made an impact in his first game of the season, going 3/3 with the bat, including two RBIs.
Dean Kontopoulos and Jeremy Bec both went 3/5 for Cards.