Notable Alumni

Most Rev. John J. Ward (+2011): Auxiliary of Los Angeles (1963-1996)
Most Rev. William R. Johnson (+1986)  Auxiliary Bishop of Los Angeles (1971-1976),  Bishop of Orange (1976-1986)
Most Rev. Juan A. Arzube (+2007) Auxiliary Bishop of Los Angeles (1971 – 2007)
His Eminence Cardinal Roger M. Mahony: Auxiliary Bishop of Fresno (1975-1980),  Bishop of Stockton (1980-1985),  Archbishop of Los Angeles (1985-2011), Cardinal Priest (1991)
Most Rev. Manuel D. Moreno (+2006)  Auxiliary Bishop of Los Angeles (1977-1982),  Bishop of Tucson (1982-2003)
Most Rev. Thaddeus A. Shubsda (+1991)Auxiliary of Los Angeles (1977-1982), Bishop of Monterey (1982)
Most Rev. Donald W. Montrose (+2008)  Rector of St. John’s Seminary College (1984-1986), Auxiliary Bishop of Los Angeles (1983-1985), Bishop of Stockton (1985-1999)
His Eminence Cardinal William J. Levada: Auxiliary Bishop of Los Angeles (1983-1986),  Archbishop of Portland, OR (1986-1995),  Archbishop of San Francisco (1995-2005),  Prefect of the Congregation for the Doctrine of the Faith (2005-2012),Created Cardinal Deacon (2006) , Cardinal Priest (2016)
Most Rev. John T. Steinbock (+2010): Auxiliary Bishop of Orange (1984-1991),  Bishop of Santa Rosa (1987-1991),  Bishop of Fresno (1991-2010)
His Eminence Cardinal Justin F. Rigali: Titular Archbishop of Volsinium (1985) , Secretary of the Congregation for Bishops,  Archbishop of St.Louis (1994-2003),  Archbishop of Philadelphia (2003-2011), Cardinal Priest (2003) 
Most Rev. Armando X. Ochoa:  Auxiliary Bishop of Los Angeles (1987-1996), Bishop of El Paso (1996-2011), Bishop of Fresno (2011-2019)
Most Rev. G. Patrick Ziemann (+ 2009) :  Auxiliary Bishop of Los Angeles (1987-1992),  Bishop of Santa Rosa (1992-1999)
Most Rev. Todd Brown: Bishop of Boise (1989-1998),  Bishop of Orange (1998-2012)
Most Rev. Michael E. Driscoll:  Auxiliary Bishop of Orange (1990-1999),  Bishop of Boise (1999-2014)
Most Rev. Sylvester D. Ryan: Rector of St. John’s Seminary College (1986), Auxiliary Bishop of Los Angeles (1990-1992),  Bishop of Monterey (1992-2006)
Most Rev. Stephen E. Blaire:  Auxiliary Bishop of Los Angeles (1990-1999),  Bishop of Stockton (1999)
Most Rev. Joseph M. Sartoris: Auxiliary of Los Angeles (1994-2002)
Most Rev. George H. Niederauer:  Rector of St. John’s Seminary (1987-1992),  Bishop of Salt Lake City (1995-2005),  Archbishop of San Francisco (2005-2012)
Most Rev. Gerald E. Wilkerson: Auxiliary Bishop of Los Angeles (1998-2015)
Most Rev. Jaime Soto: Auxiliary Bishop of Orange (2000-2007), Bishop of Sacramento (2008-)
Most Rev. Edward Wm. Clark: Rector of St. John’s Seminary College (1994-2000), Auxiliary Bishop of Los Angeles (2001)
Most Rev. Dennis P. O’Neil (+2003) Auxiliary Bishop of San Bernardino (2001-2003)
Most Rev. Gustavo Garcia-Siller, M.Sp.S.: Auxiliary Bishop of Chicago (2003-2010),  Archbishop of San Antonio (2010-)
Most Rev. Alexander Salazar: Auxiliary Bishop of Los Angeles (2004-2018)
Most Rev. James S. Wall: Bishop of Gallup (2009-)
Most Rev. Bishop Cirilo B. Flores (+2014) Auxiliary Bishop of Orange (2009-2013) ,  Bishop of San Diego (2013-2014)
Most Rev. Myron J. Cotta:  Auxiliary Bishop of Sacramento (2014-)
Most Rev. George Gallaro:  Bishop of Byzantine Eparchy of Piana degli Albanensi (2015-)
Most Rev. Joseph P. Brennan:  Auxiliary Bishop of Los Angeles (2015-2019), Bishop of Fresno (2019-)
Most Rev. Timothy E. Freyer: Auxiliary Bishop of Orange (2017-)
Most Rev. Marc Trudeau: Auxiliary Bishop of Los Angeles (2018-)
Most Rev. Alex Aclan: Auxiliary Bishop of Los Angeles (2019-)
Most Rev. Albert Bahhuth: Auxiliary Bishop of Los Angeles (2023-)
Most Rev. Brian Nunes: Auxiliary Bishop of Los Angeles (2023-)