This could also suggest that the Jay Garrick that Caitlin knew wasn't even Jay Garrick at all, specifically since he did not have any powers. We've already met Hunter Zoloman on Earth-1, who is, supposedly, Jay Garrick's double in that universe. Of course, this also works if another theory proves correct: that Zoom is actually Hunter Zoloman, who just pretended that he was Jay Garrick. We never saw a body when Zoom 'killed' him, so what if he survived to become Zoom's prisoner? We know that Zoom can easily travel through time, so it's even possible that the man in the iron mask is the presumably dead Earth-2 version of the character. However, that begs the question as to which Jay Garrick this is. Why would Zoom want to collect other versions of himself? It would make sense that he plans on harnessing the power of all his counterparts, right? What if Zoom suffers from the same malady that threatened the life of Earth-2 Jay Garrick? Remember how Caitlin had an idea to cure him with matching DNA? Well, what if Zoom has that same illness: wouldn't he also need matching DNA to cure himself? That's why the other Jay Garricks come in handy. This also leads into the theory that Earth-2 Jay Garrick, friend to Earth-1 Team Flash, is not dead, but just another Jay in Zoom's collection. The most obvious theory involves the character being Jay Garrick from an alternate Earth, which suggests that Zoom wants to collect versions of himself.

Zoom flash without mask