Borella struck 83 from 91 balls, including seven boundaries and two sixes, as the visitors passed the Patties’ 5-218.
St Pat’s won the toss with Luke Restall unbeaten on 45, while the consistent Nick Flood compiled a patient 44.
Borella’s first half-century since round six handed his team a flyer, while dangerous English import Ryan Addison (69 not out) and Greg Daniel (31 not out) guided the team home.
Elsewhere, Tallangatta hammered Wodonga Raiders.
Matt Armstrong (51) racked up his sixth half-century from 10 innings, while Dilhara Lokuhettige (43) and number 10 Sam Stephens (40) also chipped in.
Raiders replied with 133, Lokuhettige with 4-18.
And Albury posted 109, with Belvoir home by five wickets.