PORT ST. LUCIE, Fla. — Injured New York Mets closer Billy Wagner threw off a mound for what was believed to be the first time since elbow ligament replacement surgery last Sept. 10.

Wagner threw 10 pitches from flat ground, then took the mound in a 23-pitch bullpen session to minor league catcher Juan Centeno. The left-hander completed his workout with pitcher's fielding practice, then headed to the training's room for more than an hour before slipping out the back door of the rehab center without speaking to reporters.