So far this season, Gabriel Moreno has thrown out five of eight attempts to steal a base against him. That’s a startlingly low 63% kill rate. J.T. Realmuto is the only catcher in the majors with more CS (6), but he has also allowed a lot more, giving him only a 32% success rate. Moreno’s is the best kill percentage of any catcher with more than six attempts against him. Last year, nobody reached even 50%, with the same six attempt minimum. We’ll see whether this is something which sustains going forward. Even in the new, enhanced environment for stealing bases, opponents may think twice about running on Moreno.