He had been removed from the game after being struck on the back of his right hand by a foul tip that Phillies second baseman Chase Utley hit, the fifth pitch he saw from Tom Glavine in the third inning.
Lo Duca immediately walked toward the Mets dugout on the third-base side. Manager Willie Randolph and trainer Ray Ramirez came onto the field and spoke with him before Lo Duca returned to his position without throwing a ball.
"I couldn't throw at that point," he said.
He was replaced by Ramon Castro after the Mets had batted in the fourth.
Lo Duca was re-examined again before Mets left for Miami. That's when the doctor told him he feared a fracture and indicated that an additional examination Wednesday was advisable.
Lo Duca was struck on the same hand on Opening Day. In both instances, he went to receive the pitch with his hand behind him. In this case, his right hand moved away from his body as he shifted his feet.
Marty Noble is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.