Was a big fan of Mein as well. He lost that Alves fight due to pure stupidity on his part. This is what he said about retiring:
"I’m super happy with the way my career went and everything I’ve done in the sport, so I don’t really have that feeling of 'I can’t retire because I haven’t done anything in my career and I don’t feel satisfied,'" Mein told UFC.com. "I do feel satisfied, and I’m happy with myself. I’m not coming to the gym saying 'I made the wrong decision.' I’m feeling good about the choices I made in my career. I think it would be different if I didn’t feel that way and if it was a forced situation. I really got into teaching," Mein said. "I love martial arts, it’s just the competition side of it, staying at that high intensity and high level, and I’m going to a different aspect of life. I just don’t want to compete anymore at the highest level. I still love to compete in the gym, and I’m more into wanting to teach and maybe even going a different route and getting away from martial arts and doing something else. I don’t know yet."
Frankie Perez and Jimmy Hettes come to mind as well.