He played outfield for the Bluefish again in 2011, his fourth year with the team. He faced De Los Santos, who was pitching for the Long Island Ducks, the same pitcher who had hit him in the head in his sole Major League at bat, and this time he singled. Greenberg said: It was a big deal. As much as I might try to pretend it wasn't. It's been five and a half years, and to face him again in a game that meant something and get the result, to get a hit off him, it was a special moment. ... You have the what-if stuff, 'what if he threw that first pitch for a strike five and a half years ago?' Greenberg later went hitless in his seven remaining at bats against De Los Santos throughout the course of the season. He led the Bluefish in several categories in the 2011 season, including triples, walks and stolen bases.