Up until Vatican II, St. Fidelis was a thriving parish. For many years, it was led by Father (and eventually Monsignor) William J. Osborne. Monsignor Osborne died in 1998 at the age of 102, the oldest living Catholic priest in the United States at the time. In the 1950s and 1960s, there were four daily masses in St. Fidelis Parish, as well as ten Sunday masses in three venues. Currently, with diminished enrollments and changing demographics, there is one daily mass, and four Sunday masses, one in Spanish.