Caballero was lucky to get the win against Mathebula two fights ago. I didn't see his other recent fight but he's also been very unimpressive at times, there and against Lacierva notably. Calderon's also had more title defenses than Caballero if you want to go down that road but honestly that doesn't do all that much for me.
Partially I didn't think that highly of Molitor so I don't know what to think of Caballero's wins, they're not that great. Then I think Calderon is just better, obviously that's subjective but I think he's clearly better.
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