Other than saying he didn't believe Duda suffered the injury sliding under Carlos Ruiz's tag for a run in the sixth inning, Mets manager Terry Collins said he did not know how Duda was hurt. But Duda was in enough pain to warrant a medical evaluation.
"Similar situation that we had with Justin Turner," said Collins. "These things can get bad."
Turner was placed on the DL on Tuesday with an intercostal strain.
With Duda out, Collins moved Daniel Murphy to first base on Saturday and inserted Jordany Valdespin at second.
"Today, [Jonathan Pettibone] is pitching, lefties are hitting him pretty good, so I wanted to get Valdespin in there and Murph at first," Collins said.