From Tom Singer of MLB.com:
Second baseman Luis Castillo was placed on the 15-day disabled list with a bruised right heel on Friday by the Mets.Castillo’s disablement followed an MRI on his sore heel Thursday at New York’s Hospital for Special Surgery, which was negative. He is hitting .241 with a .347 on-base percentage in 44 games with the Mets.
Ruben Tejada was recalled to take his spot on the roster.