Baty was diagnosed with a fractured left index finger Sunday and is expected to be sidelined 4-to-6 weeks.
Baty had .997 OPS in his last 12 games with Triple-A Syracuse and had a chance of rejoining the Mets down the stretch, but the injury will instead put him on the injured list for the foreseeable future. The 25-year-old hasn't been ruled out for the season, but any complications in his recovery would make a return this year difficult.