I know 2 guys that were or still are in prob wrestling. Both of the guys were always injured it seems. One of the guys actually made it into the WWF, it might have been like a minor league for them or something but I forget. Anyways, this guy ended up getting run through with a spear acting out a stunt! He was hurt pretty bad and was out of wresting for quite awhile. While he was out, the WWF dropped him like a hot potato. After working it for another year or so in other organizations he finally gave it up because like others have said the pay sucks and you travel all the time. He is now a nurse practitioner or some equivalent of that and much happier I think.
The other guy always was limping around with something hurt. Usually it was lower limb related, like knee or broken bones.