The Shamrocks blanked the Bearcats 3-0 in Game 1 and earned a 13-9 victory in Game 2.
In the opener, Shamrocks pitcher Matt Loy allowed just three hits and struck out five in a complete-game shutout.
No statistics were available for the second contest.
Truro (1-7) returns to the diamond on Sunday when it visits the Pictou County Albions for two games in Stellarton, beginning at 1 p.m.