Thomas's three homers tied a program record last achieved by Deon Stafford Jr. in 2016.
Thomas homered in the sixth inning as part of a seven-run frame that sealed the win for Saint Joseph's.
Brendan Hueth drove in two runs while Conlan Wall finished 3-for-3 and crossed the plate three times.
Mike Falco recorded the win, tossing four scoreless innings in relief. He collected four strikeouts.
The start of the day though, again, was Thomas. He now has ten homers on the season with 37 RBIs while hitting .351.
The win improved the Hawks to 3-3 in Atlantic 10 play.
The club hosts Delaware in a non-conference contest on Tuesday.
