https://www.baseball-reference.com/players/p/perezro02-field.shtml
*sighs* He is having the worst year of his career, I can give you that, but if you look at some of his advanced numbers, he is still in the top 10 in good categories on defense. I mean the league average for RF/9 is 9.07 for a catcher and he is at 10.99. RF/G for the league is at 9.02 and he is at 10.11. I am not sure how you say a catcher is bad, when his advanced numbers still make him a top 10 defensive catcher when he is having a bad year overall. He is Bauer's battery mate and has been for the last year and what has Bauer's ERA been since he was his permanent battery mate, is like under 3. So maybe he is having a bad year, but no way in heck can you not say he isn't Bauer's battery mate. Gomes hasn't caught him since last year and since the permanent distinction, his ERA is under 3 and when he is catching we give up less than 4 runs a game. League average for a catcher is 4.40 so maybe I guess he is bad, when he is in the top tier of catchers.