Johnson said that the pains started on Saturday night after the game against the Orioles, but they worsened on Sunday to the point that he had to go to the hospital. He did not return to Nationals Park until the team was ready to travel to New York that evening.
"I feel like I do every other day. I feel good, real good," Johnson said.
Bill Ladson is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.