Mets OF Yoenis Cespedes hit against teammate Noah Syndergaard during a simulated game on Tuesday at Citi Field.
Cespedes, who is scheduled to run and do fielding drills on Wednesday, may not need a rehab assignment before returning, Mets manager Mickey Callaway recently said.
The 32-year-old Cespedes has been on the disabled list since May 14 due to a strained right hip flexor.
He started running last week at Miller Park in Milwaukee in the latest step of his recovery.
Cespedes is hitting .255/.316/.474 with eight HR in 37 games this season.