The Bulldogs put the tying run on base in the ninth before the final out was recorded. Yale fell to 10-14 overall.
Yale pounded out 15 hits and it marked the 14th time the Bulldogs have produced at least 10 in a game.
After falling behind 7-2, the Bulldogs stormed back with four runs in the fourth capped by a two-run double from Fuller. The Stags put up two runs in the fifth to make it 9-6.
Ronai led off the next inning with his fourth homer of the season, a solo shot to left. Later in the inning, Fuller scored Dai Dai Otaka on a single to left.
The Bulldogs pulled closer in the seventh with Mason LaPlante scored on a wild pitch.
Yale returns to action this Saturday to begin a three-game series at Harvard. Both teams will enter the weekend with a 4-2 Ivy League mark.
Report filed by Ernie Bertothy, Yale Sports Publicity