Mets RHP Matt Harvey has been diagnosed with a stress injury to the scapula bone in his throwing shoulder, the team announced Thursday afternoon.
"He is expected to miss several weeks," the team added.
Harvey's spot on the roster was not immediately filled since the team did not have a player ready to replace him.
According to Mets GM Sandy Alderson, the injury is not a fracture. However, if it is left untreated, it could eventually become a fracture.
Harvey received a PRP injection and will rehab until he is pain free, at which time he will begin a throwing program to return to pitch, Alderson explained.
"It's something that just came up," Alderson added. "This is not something we've been monitoring in his history. So, this is new. He was complaining of a tired arm, a dead arm, so this is something that was just diagnosed today."
Harvey told reporters Wednesday night that he would need to see a doctor Thursday after experiencing what he believed to be dead arm during his start earlier in the night.
In what was his shortest outing of the year, Harvey tossed only 58 pitches and allowed four runs, including three home runs.
"I'm just pretty tired, my arm's just not working," he told reporters after the game. "In past games it's taken a while to get loose, that's kind of been the issue. But tonight, it got loose and kind of progressively felt really tired."
Harvey immediately had trouble as he allowed back-to-back home runs to Anthony Rizzo and Ian Happ in the first inning. He managed to keep the Cubs scoreless the next two frames, but watched his fastball progressively dip in velocity as he left the game an inning later.
"It's frustrating for me to be taken out that early and not feel great physically, and I have to get checked out by a doctor," he explained. "It's the last thing I want to have happen, but I'll put my trust in them and we'll go from there."
Harvey has now allowed 16 home runs 13 starts this year, which is the most he's given up in any one season. He said the fastballs he threw Wednesday, which reached as low as 86-87 mph, were the slowest his thrown since his freshman year of high school.
"I tried to battle through it and see if it would progressively get better as the game went on as it has in the past," Harvey concluded. "It's been a very difficult year, a lot of ups and downs. A lot of discomfort, trying to battle through and strengthen areas that I'm not used to. It's been rough."
"It would be one thing if Matt was at 91, 92. It's another thing when it was at 89," manager Terry Collins said late Wednesday. "I'm concerned."