Outfielder Brandon Nimmo was activated from the injured list by the Mets after missing two months because of a detached hand ligament.
Jeurys Familia, whom the Mets traded to the A's in July last season, is returning to the Mets on a three-year, $30 million deal, according to multiple reports.
The Athletics acquired Mets reliever Jeurys Familia on Saturday in an effort to bolster a bullpen that includes All-Star closer Blake Treinen.
The New York Mets will sit closer Jeurys Familia Saturday against the New York Yankees while they continue to work on a trade with Oakland.
Mets closer Jeurys Familia was held out of Friday night's win over the Yankees, with manager Mickey Callaway saying he was told midgame not to use Familia because "there could be a potential trade happening."
Mets closer Jeurys Familia, who went on the DL because of a sore right shoulder, was activated on Sunday. Outfielder Jay Bruce also returned to the lineup after missing the past three games with a sore back.