Matt Harvey (scapula) and Noah Syndergaard (lat strain) began their respective throwing programs before tonight's game at Citi Field.
"He looked free and easy," Terry Collins later said about Syndergaard.
"I really wanted to ramp things up there," Syndergaard said. "That's how good I felt. But I know I don't need to rush it back."
Syndergaard has been out since April 30 with a torn lat. He's been pain-free since last month. However, he said at the time that he wanted to be extra cautious in his returm.
Harvey was placed on the disabled list June 16 with a stress injury to the scapula bone in his throwing shoulder.
He said he felt good while throwing on Monday and that he "hasn't really had any pain" since a few days after he received a platelet-rich plasma injection in mid-June.
In late-June, Mets GM Sandy Alderson said the injury to Harvey, who had been complaining of "dead arm," was new. However, Dan Warthen later said that the muscles behind Harvey's shoulder following his thoracic outlet surgery had atrophied to a point that they were half the size of those on his left shoulder.
According to Warthen, team doctors didn't discover the muscle issue until Harvey was placed on the disabled list.
Video of Noah Syndergaard throwing today pic.twitter.com/yjW0RA0DUW- SportsNet New York (@SNYtv) July 17, 2017
"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 said after his start on June 14, when his fastball velocity dipped as low as 86 MPH. "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."
The 24-year-old Syndergaard, who is on the 60-day disabled list, has a 3.29 ERA and 1.10 WHIP with two walks and 32 strikeouts in 27 1/3 innings (five starts) this season.
Harvey, 28, has a 5.25 ERA and 1.45 WHIP with 54 strikeouts in 70 1/3 innings (13 starts) this season.