It was a little bit of a surprise when the Diamondbacks added René Pinto to their 40-man roster on January 10th, selecting him off waivers from the Baltimore Orioles. After all, the team already had three catchers on the roster there. It was generally expected that Jose Herrera or Adrian Del Castillo would back up Gabriel Moreno behind the plate for Arizona. With Herrera out of options, he perhaps has the inside track, perhaps giving Del Castillo, who’s still only 25, the chance to practice controlling the running-game down on an everyday basis in Reno. That was certainly an obvious weakness for him last year, being credited with only two CS in 29 attempts - and one of the two wasn’t really on him.