Jake Heaps was one example. You could pick a few from that class alone. The linebacker that got in the brawl, for example. Instead of looking at the starters, look at the 4 star and high 3 star guts b not starting. Munns. Lark. Or guts like Riley Nelson that beat them out after leaving USU where he started as a freshman.
When USU puts DJ Nelson in the NFL, get back to me.
Look at the toured guts that transfer out to get PT after not getting it at BYU. Focus on QBs. Plenty to choose from.