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There's no hurry with Romero. September is about 3 weeks away. Romero will (probably) get a call up and have a chance to work with Edgar. Then in spring training, he'll get a chance to compete. It's unlikely he'll make the MLB roster at that point, but he'll be on the bubble and if (when) someone gets injured, he'll get the call up and have a chance to show what he can do.