Aw come on... His arm was awesome from the get go. I can't argue the fact that he was juicin' with Canseco, but he's been more than an average at best defender. His biggest issue through out the majority of his career was the fact he wasn't much of a game caller, but that has changed some imo.
How many catching clinics have you attended? His plate blocking skills were and still are ATROCIOUS and that's a huge, immeasurable part of pitcher confidence.
His arm has been dynamite, but his catching skills always were average, at best.