VIERA, Fla. — Just as one member of the Nationals bullpen is returning to full strength, another is being shut down due to injury.
Right-hander Tyler Clippard was back participating in full drills Sunday at Nationals camp, five days after tweaking his back. Clippard experienced no setbacks during the workout, and manager Matt Williams said he's cleared to throw off a bullpen mound again Monday.
Clippard will remain a couple of days behind the rest of the pitching staff, which began throwing live batting practice over the weekend, but the veteran reliever should be able to catch up to his teammates before the Grapefruit League opens Friday.
Ryan Mattheus, meanwhile, has been shut down with an injury to his upper right chest, the extent of which is still being determined.
Mattheus, who hasn't thrown off a mound in several days, is awaiting MRI results before the Nationals will decide how to proceed. The right-hander is one of several pitchers competing for one or two available spots in the Opening Day bullpen.