From MLB.com:

Reds catcher Wilkin Castillo’s non-selection to the Dominican squad at the World Baseball Classic could help his cause during an even more important selection process.

Castillo, who can also play positions in the infield and outfield, is trying to make the Reds as an extra player.

snip…

Baker isn’t ruling out carrying three catchers on his 25-man roster, and Castillo benefits from also being able to play third base and shortstop. Ramon Hernandez and Ryan Hanigan are the likely Nos. 1 and 2 catchers, respectively.

“It’s a possibility,” Baker said of three catchers. “If you’re going to have a third catcher, you’d like him to be more versatile. He could play a lot of places. It depends on how it pencils out with how many outfielders we take, right-handed or left-handed as we put the pieces of the puzzle together and what you have and what your needs are, and how to place them. That’s how you build a team and try to get away from having any weaknesses.”

I don’t know much about Castillo, but it appears to me that he’s a catcher that owns infielder and outfielder gloves…I see no sign that he’s proficient with either one. We’ll see how this shakes out.