Castro could close some games toward the end of this season, Patrick Saunders of the Denver Post reports.
Jake McGee and Jason Motte are the two most likely candidates to open the season as the Rockies closer, creating a roadblock to any save opportunities in the earlier part of the season for the young fireballer. However, Castro has proven that he can pitch well against major league hitters this spring, and if he can translate it to the regular season, he could work his way into higher-leverage innings and possibly even some save situations if McGee or Motte get hurt or falter.