It might have been. All I know was the Doctor's were able to heal him to the point that he had a fine baseball career, but his NFL days were over. Peterson had an injury that prior was considered "career ending" for a running back, came back the next season and ran for 2k yards... Medicine is truly amazing these days and who knows what could've happened if Bo had access to todays medicine back then.IIRC Jackson's injury was a hip? Wasn't Peterson's an ACL? Of course Sayers is the most extreme example.
To me its really just the shame of knowing we never really got to see much of perhaps the greatest natural athlete the game has ever seen