I've seen a few posts that have involved some back and forth on the exact requirements for having your jersey retired at BYU. Here are the official stated requirements from BYU's athletic department:
“The individual must have been a First Team All-American; a recipient of a major national award (ie Davey Obrien, Heisman, John Wooden Award etc.); a university graduate; achieved significant athletic, civic or religious accomplishments after graduation from BYU; a faithful member of The Church of Jesus Christ of Latter-day Saints or other religious affiliation and a 15-year period must have past since the individual finished his or her athletic career at BYU.” - See more at:
http://universe.byu.edu/2013/02/12/byu-to-retire-jerseys-of-mel-hutchins-and-roland-minson/#sthash.Fd4UZFb9.dpuf
Based on the Catholics I know and how they "live" their religion, I'd say Jimmy more than qualifies for the requirement of being a "faithful member" of an other religious affiliation.
I love that Jimmy has gotten his degree and will be rewarded with what he deserves and has earned.