The Cats shot 42.6% from the field, but missed all 10 three-point attempts.
St. Mary's led at the half, but Arizona's defense forced 24 turnovers and kept the Gaels off the glass late in the second half as they pulled away at the end.
Ivan Radenovic was one point and one rebound away from his second straight double-double but was more important on the defensive end where he shut down Daniel Kickert. Kickert, St. Mary's leading scorer at over 20 points a game, was held scoreless at the half and finished with just seven points.
Marcus Williams got the start for Arizona and was the only other Wildcat in double figures. He scored 14 points and played all over the court seeing time at the two, three and four.
Chris Rodgers rebounded from a second half benching against NAU to put in a solid game. He dished out a team high 13 assists, but was much more unselfish and did a stellar job on the defensive end.
The Wildcats shot over 55% in the second half and much of that could be attributed to patience on offense. They took just three outside shots and worked the ball around to get looks inside.