Potential suspensions aside, I would have guessed we would lose 3-6 players between now and August. It's pretty common in college football and even more common with a new coach. Streveler played in the Spring Game before transferring out.
Thankfully, for the players and the programs, the spring is a good time for a coach to sit a player down and let him know where he stands. I think it's similar to what Claeys did with Rhoda. They had a discussion and he probably said that there is a very small chance that he was not going to get jumped on the depth chart. They were probably 100% honest and said "and we're going to bring in JuCo QB". It's out of respect for the player that coaches do this. They let the guys know, if you are hoping to get PT, you'll probably have to look elsewhere.
We also saw it a couple years ago with Jephete Matilus.
I'm not going to start throwing out names, but we have some upperclassmen that seem like they will have a difficult time breaking into any sort of rotation. It's pretty likely that a couple of them would prefer to get PT for an FCS somewhere.
I could be wrong, but I don't think we will have a scholarship issue.