Well, his one knee was just put back together. Gore has torn his left ACL twice, in addition to all the other wear and tear. I'm not sure you can say Ajayyi is broken down when you have Gore on the team.
That said, it takes awhile to come back from an ACL fully and Ajayyi is probably not ready at this point so unless your plan is to lowball him on a 2 year deal with the plan of putting him on PUP to start the year knowing you may not get anything out of him at all this season I'm not sure it makes much sense right now.