Originally Posted by M2
I'd suggest he's a backup because the Reds don't really think he's all that good with the glove when push comes to shove. I think Kc's right that Castro's probably seen more as a 3B defensive replacement than a SS by the organization.
Because if the Reds really thought he was a quality defensive SS then Gonzalez would be redundant. In other words, Castro's deficits have plenty of effect on why the team would pursue a guy like Gonzalez. He'd be brought in to do what Castro can't, give the team some top tier defense at SS.
I'd say Castro's a backup because he can't hit his way out of a wet paper bag. He wasn't a starter when they traded for him, and he isn't now. Castro has no effect on whether the team goes after a Gonzalez or a slugging type who doesn't field as well.