The Mets start a series vs. the Philadelphia Phillies on Monday.
DJ Stewart replaced Nimmo in left field and the leadoff spot Sunday.
“I’m pretty optimistic that we caught it early,” Mendoza said. “We were able to treat it last night, and he’s feeling good today.”
In other injury news, it’s unclear when No. 1 starter Kodai Senga will throw live batting practice again or begin a minor league rehab assignment during his recovery from a right shoulder capsule strain.
Senga faced hitters twice in the past two weeks, but he’s back to just throwing bullpens probably for the next week or so, Mendoza said.
“We don’t want to put him at risk,” Mendoza said. “He’s very meticulous about his craft.”
Elsewhere, right-hander Tylor Megill (shoulder strain) pitched 5 1/3 shutout innings for Triple-A Syracuse, allowing seven hits with six strikeouts and no walks. He is expected to be reinstated from his rehab assignment this week, and the Mets must decide whether to bring him back to the big leagues or option him to Syracuse.
Right-handed reliever Drew Smith (shoulder soreness) could come off the injured list Monday or Tuesday, and left-hander David Peterson (left hip surgery) is scheduled to make another rehab start Tuesday at Double-A Binghamton and could be ready to come off the IL when eligible on May 27.
The Associated Press contributed to this report.
