Mets RHP Zack Wheeler threw another bullpen session on Wednesday in Port St. Lucie, mixing curveballs in for the first time.
Wheeler could pitch in his first Grapefruit League game on March 8 against the Astros, manager Terry Collins said.
Wheeler threw about 20 pitches off a mound on Sunday for the first time since he felt some tenderness in his right elbow during a recent bullpen session.
Pitching coach Dan Warthen said last Wednesday that the tenderness Wheeler felt during his bullpen session early last week was likely due to scar tissue, which remains from his Tommy John surgery.
Wheeler's recent physical revealed no structural damage, but the team will take things slowly with him during Spring Training, Warthen explained.
Wheeler's innings limit this season will likely be in the low-100 range.
He hasn't pitched in the majors since 2014 due to the Tommy John surgery and multiple setbacks during the rehab process.
Warthen added that it would be "difficult" for Wheeler to pitch out of the bullpen due to the length of his recovery and the unfamiliarity he has with the role.