Giarratano served as hitting instructor, offensive coordinator, and third base coach and helped lead the team to the 1998 College World Series final.

The Dons have also claimed a pair of West Coast Conference championships and earned Giarratano WCC Coach of the Year honors three times.

[1] On March 11, 2022, ESPN released an article titled Ex-San Francisco Dons baseball players sue Nino Giarratano, Troy Nakamura and others over alleged behavior alleging that head coach Giarratano and former assistant, Troy Nakamura oversaw an environment that "included persistent psychological abuse and repeated inappropriate sexual conduct."

"[8] "John Doe 1" alleged that Giarratano referred to him using several expletives and repeatedly berated him in an attempt to pressure him to leave the program (he had a significant four-year guaranteed scholarship).

"John Doe 2" outlined a pattern of verbal and emotional abuse that resulted in five emergency room visits in the fall of 2021, contributing to his decision to leave the program.

"John Doe 3" said Giarratano told him he was a waste of space, that none of his teammates or coaches liked him, and said, "I wish I could take my bat and hit your head as hard as I can, and maybe I can get your brain to work," according to the lawsuit.