Junior transfer Brandon Lam had wins in doubles and singles against the Jaguars.
Ty Gentry and Joshua Charlton won their doubles match Saturday, their 10th win of the season.
The Ducks open play Saturday at 8 a.m. (PT) against Georgia Tech in College Station, Texas.
Riki Oshima and Jesper Klöv-Nilsson rallied for a pair of three-set wins Sunday afternoon.
Freshman Luke Vandecasteele tallied two wins in Saturday's victory over the Gauchos.
Senior Ty Gentry and sophomore Joshua Charlton were the No. 8 doubles tandem in the country coming off the fall, and their potential this spring is sky-high.