The Nationals expect Storen’s diagnosis will reveal a small bone chip in his right elbow. Storen would require surgery to remove the bone chip, which causes significant pain, and he could miss roughly half the season.

The Nationals believed Morse’s lat strain, first diagnosed March 6, had healed. But Monday night he experienced a setback, unable to throw the ball from left field to shortstop during a minor league rehab appearance at Class A Hagerstown. The Nationals had expected Morse to return for tomorrow’s home opener. Instead, the fact that they are sending his results to Andrews indicates surgery is an option.

Johnson said he expected to know more about Morse and Storen following today’s game.