He's 38, that explains the blocked balls. The team needs a catcher to take 50% of the games from Pudge, that's the real problem.
Then how do you explain early in his career? That was one of his biggest criticisms in Texas and he never bothered to correct it - translation: he's lazy. He never had to worry about being a good defensive catcher because he hit well and threw out runners (all not that legit if you ask me since he was clearly on steroids...).