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Castillo is not in the lineup for Thursday's Opening Day contest against the Cardinals.

A strong spring for Castillo earned him an Opening Day call-up despite the fact that he'd only played in 18 Triple-A games. The promotion was perhaps even more surprising given that the Pirates are in no rush to win and didn't call up fellow middle infield prospect Oneil Cruz. Castillo's inclusion apparently doesn't mean he'll have an everyday role, however. Kevin Newman starts at shortstop, while Hoy Park starts at second base. Castillo is a righty while Park bats left-handed, so it's possible Pittsburgh plans to utilize a platoon at the keystone.

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