No. There are still interesting fights out there for him. There is supposedly a clause in the fight contract wherein either fighter can resign from Strikeforce and become a free agent upon losing. Is it a three-round fight?
Yes, a 3 round fight. I think he should retire should he lose. There have been reports that his heart just isn't in it anymore and I believe his wife just had a child. If he isn't focused and into fighting like he used to be, there is no need to continue putting yourself at risk of injury.
If hes not in it 100% he shouldn't be in it at all. I'd probably lean towards he should retire if he loses. 3 in a row and one to a guy who barely makes 205? There may be some interesting match ups still but I don't want to see him get beat up several more times in a row by guys he would have crushed in his prime. Maybe if he makes a move to 205 but I think heavyweights are getting bigger, more athletic, and more skilled. Fedor just wouldn't be able to get it done against those guys at this point in his career.