The Mets added outfielder Jay Bruce, LH reliever Jon Niese, Triple-A infielder Ty Kelly and LH reliever Josh Edgin to their 25-man roster, the team announced.
In turn, shortstop Asdrubal Cabrera and outfielder Justin Ruggiano have been put on the 15-day disabled list, while reliever Seth Lugo and outfielder Brandon Nimmo have been sent back to Triple-A.
Cabrera left the game on July 31 with a strained patella tendon in his left knee. He had similar injury in spring training, which caused him to miss 17 days.
Ruggiano, who was acquired July 30, left a game two days later with a mild hamstring strain.