An X-ray on Mets outfielder Brandon Nimmo's partially collapsed lung revealed less air in his chest cavity, according to the New York Post's Mike Puma.
Nimmo, who went on the disabled list Saturday afternoon, complained about how he felt following New York's series in St. Louis and went to the hospital for further evaluations. He told reporters on Saturday he didn't know exactly what caused the partially collapsed lung.
"To be honest, there is no real cause," manager Terry Collins said, according to NJ.com's Abbey Mastracco. "It just happens. The doctors said there are certain athletes where once in a while, it just happens. It's not caused by anything except it just pops up once in a while."
While Nimmo told the New York Daily News' Kristie Ackert he did not have any symptoms on the team's flight from Washington D.C. to St. Louis, he said he will not fly during the All-Star break.
"This is just something you rest, not a whole lot of treatment you can do for it," Nimmo said on Saturday, according to Ackert. "The doctors were already encouraged by where it was."
The Mets haven't given a timetable for his return, however he said, "I think we should be good by Thursday."
Nimmo was hitting .350 with no home runs and two RBIs in 15 games this season in the majors. In the minors, he was hitting .223 with three home runs and 16 RBIs in 38 games with Triple-A Las Vegas.