Perez (forearm) began a rehab assignment with Double-A Binghamton on Tuesday, striking out two in a perfect frame.
It's the first game action since late July for Perez, who is coming back from a left forearm strain. Perez has been terrific since joining the Mets, posting a 4.21 ERA but an impressive 32:5 K:BB over 25.2 innings. He should be activated in the coming days.