In 2002, the school undertook a major campus renovation with plans for the replacement of the Tate Duff Memorial gymnasium.

A leveled site groundbreaking for the new facility was held on April 16, 2003, with Bishop Zavala conducting the ceremony.

The new Student Activity Center houses a main pavilion which seats 1600 spectators for Masses, assemblies, rallies and basketball and volleyball contests.

In 2008 the facility was named in honor of Bishop Amat's first President, Monsignor Aidan Carroll who developed the concept of the center and raised the money to pay its cost.

Bishop Amat participates in the Southern Section of the California Interscholastic Federation, fielding 42 teams in 15 sports, Amat Lancers have won four state championships - girls' basketball (2), Girls Cross Country (1), and Boys Cross Country (1).

[7] The Bishop Amat football program won the CIF-SS championships in 1961, 1970[permanent dead link‍], 1971 Archived September 24, 2021, at the Wayback Machine, 1992, 1995.