Achilles tendon harvested from a cadaver Yeah, I wouldn't recommend this route, either. I read an article in The New Yorker about body parts harvested from cadavers that were used in transplants. The parts were way past their harvest-by date. This was discovered, at least partially, by someone having an ACL transplant from one of this bad parts, and the recipient of the bad part died from bad infection due to a mold…
I didn't know that, but cadaver parts freak me out so when I had my ACL done I did the standard patellagraph. If I tear the same knee again I'll have to go cadaver or hamstring, but hopefully that never happens (knock on wood). The problem with the hamstring is it never quite heals as strong.
As an aside, pro-athletes typically go cadaver because the time to heal can be quicker. They probably aren't getting bad ones though.