3 were JUCO transfers, so they would be expected to be gone by now, anyway.
1 was a UF commit that came here when he found out that he couldn't get into Florida, showed up fat, out of shape, and never did anything, anyway.
1 transferred a week after arriving on campus because Big Dan apparently hit him so hard that his butt went through his head.
1 was a guy that had a thing for Ipods, I guess.
1 didn't want to play football or go to college anymore, so he moved home to ATL.
1 went to USU because he didn't like the coaching change. This sort of thing is expected when there is a change of staff.
A couple of others transferred because they were recruited over/didn't pan out, but this happens to almost every class at every big program.
The majority of those left will likely contribute a good amount this year.
Edit: Totally forgot about Justin Meredith. Nobody would have guessed that his hamstring would have caused a permanent issue and he would never play again.
Good summation. All classes typically have a certain level of attrition for various reasons, but at the end of the day you hope that half wind up being pretty strong contributors to the program.
2012 was particularly bad because, as we all know, we didn't sign a single OL.
Furthermore, if you look at who's left from that class, it looks even worse. By my estimation, we should only expect any significant contribution (defined as taking significant snaps in the 2 deep on O or D) from only two players of the 22 originally from that class...Jason Croom and Danny O'Brien. Bullock did the place kicking in the Spring, but freshman Aaron Medley will likely supplant him in the Fall.
Perhaps Kenny Bynum or LaTroy Lewis will pick up beyond how they played in the Spring, but it's more than fair to say that they have been recruited over and won't see much time outside of maybe Special Teams. That leaves Peterman, Bowles, Blanc and perhaps, on an outside chance, Pig Howard if he comes back.
That means that 3 seasons later, when you need to rely heavily on that class's talent and leadership, we have 2 guys we can expect that from. And let's be honest, Danny O'Brien plays hard but he's just not talented enough to do more than provide depth at the DT position.
So, arguably only 2 of the 22 members of the 2012 class seem to project as strong contributors this year, or 9% of that class. One a backup DT, one as the 4th WR.