JUPITER, Fla. -- Right-hander Ryan Mattheus has missed most of Spring Training because of chest inflammation and may not make the Opening Day roster, according to Nationals manager Matt Williams.
Entering Monday's action, Mattheus had pitched just 1 2/3 innings with three strikeouts.
"He has to try to build arm strength. To take him into a pressure situation right now with him not having enough innings in spring -- it's not fair," Williams said.
Mattheus said his arm is in great shape and feels he could be ready for Opening Day.
"I feel great," he said. "I do need a workload, I do need a few more innings. But I came into camp in shape. The arm being in shape is not going to be a question."
Bill Ladson is a reporter for MLB.com and writes an MLBlog, All Nats All the time. He also could be found on Twitter @WashingNats. This story was not subject to the approval of Major League Baseball or its clubs.