Harvey has another physical setback

Mets pitcher Matt Harvey will be sidelined for several weeks with a stress injury to the scapula bone in the right shoulder, the latest setback to a career already slowed by Tommy John surgery and a thoracic outlet syndrome operation.

The injury-ravaged Mets also put second baseman Neil Walker on the 10-day disabled list with a partially torn left hamstring.

The moves came as the sub.500 Mets, who have played well lately, got ready to open a fourgame series against the National League East-leading Nationals.

Mets general manager Sandy Alderson said Harvey is expected to go on the DL on Friday. The Mets, reticent to be precise with outlooks of injured players, said only that Harvey and Walker are expected to miss “severalweeks.”

Harvey had a platelet-rich plasma injection Thursday, a day after his fastball averaged 91.8 mph against the Cubs, down from94-96.5 mph in his previous starts this season, according to Brooks Baseball.

“I think the last time I threw87 (mph) with a fastball was probably freshman year of high school,” he said after the game.

Harvey was pulled after four innings in a 9-4 win.

“He was complaining about dead arm,” Alderson said.

Alderson said the injury was somewhere between a fracture and bruise. As for Harvey’s return to the rotation, “the amount of time we expect he will be out is measured in weeks, not months,” Alderson said.

Mets manager Terry Collins said Harvey is “disappointed” but added that it’s “still not a bad scenario where you’re looking at another surgery.”

Alderson estimated Walker could need two to threeweeks of rehabilitation, then more time to rejoin the Mets.