She helped the team to win state titles in her sophomore and junior years, and was a Parade and NSCAA All-American.
In 1999, she was named Big East Championship Most Outstanding Player, and later that year was awarded an NCAA Postgraduate Scholarship.
[5] In club soccer, Mascaro played for the San Diego Spirit from 2001 to 2002,[5] where she scored 3 goals and recorded 6 assists in 28 appearances.
[6] After graduating high school, Mascaro was included as an alternate player in the United States squad for the inaugural women's soccer tournament at the 1996 Summer Olympics in Atlanta.
[4] She made her international debut for the United States on February 24, 1999 in a friendly match against Finland.