Mazzei took over the softball program in 1989 and garnered the program unequaled success and notoriety.  He led the team to a program record 34-17 record in 1993, a year in which the team also posted the NCAA's top softball GPA at 3.24.  Mazzei tallied three straight years of 30 or more wins, the best run of any coach in any sport at Manhattan College at the time.  In 1994, his team shared the MAAC Regular Season Championship with Canisius, the only regular season title for the program.  He recruited and coached three Manhattan College Athletic Hall of Famers, as well as three Academic All-Americans.  His teams produced several NCAA season and career records, and led the nation in numerous statistical categories.