All drafts and even FA's are that way JD.
Cinci thought they were going to get the Bucs version of Antonio Bryant. Nope, bad knee.
Some people last year thought Suh's knee was going to be a problem. Nope. Damn-good player sofar and drafted 2nd overall.
Nearly three teams thought T.O. was the "answer." Was he, or was he another problem? ..Yup, problem.
K2 was said to have a very bad knee, they were laughing at us in the doghouse. Well, who's laughing now? ..We got good production out of him so

Cleveland!
It's ALL luck and speculation no matter whom you pick up from where.