A CT scan of Nationals left fielder Jayson Werth’s left wrist at the Mayo Clinic in Rochester, Minn., on Thursday revealed two small fractures, according to a baseball source. The Nationals have not confirmed the news. Dr. Richard Berger, who operated on Werth’s wrist in 2012, is convinced that the veteran outfielder will return to full strength. If Werth’s rehabilitation goes according to plan, he could return as early as August.