yeah probably best to start over,,.was it in a drought that it lost its leaves,because i had the same thing happen to me.i was growing a apple tree in a container and forgot to water it all the leaves and fruit dropped off and i thought it was dead,but it came back the next year,i think it went into early dormancy to protect itself...check some of the topish branches cut into them and see if the wood is green moist and if its not getting any water from the roots it will have lines on it like when a graft doesn't take and desiccates,but if it isn't green when you cut into it it definitely dead,but the rootstock should throw up some new shoots you can graft onto....if you find some live wood i'd store it just incase,

Thank you Wayne and Luke for your thoughts.

There is no mechanical damage because there is no lawn nor any activity in the area, they split all by themselves. I will probably remove them. Oh well, it was worth a try...

It kinda looks like a scion was removed, when younger.

I went back and looked at the photos of the grafts I took at purchase; they looked okay, not great, but okay. Guess they were not okay after all.

That looks like an old injury, with perhaps one or two year's worth of healing going on. It might have been injured when you bought it, just not showing yet.

You could wait it out and see if they will close in.............