Roemer (7-3) , who was named the most outstanding player of the regional, held the potent Arizona offense in check for a second straight night, limiting UA to three runs on eight hits in eight innings of work. He finished with five strikeouts and no walks and was aided by multiple diving plays by his defense.
Vinny Pestano worked the ninth for his team-leading 13th save of the season.
Offensively, CSF took advantage of three Arizona defensive miscues and posted four hits in the third inning alone to break open a 1-0 lead with five runs in the frame for a six-run advantage.
The Wildcats edged close with single runs in the sixth, seventh and ninth, but each time Arizona threatened to turn out a big inning, the Titan defense came to life to snuff it out.
UA's John Meloan (10-3) was charged with the loss despite giving up just two earned runs on five hits in 2 2/3 innings.