"From my understanding, it's not something that's terribly significant," president of baseball operations Andy MacPhail said. "It might back him up a few days. We're going to have to see how it goes."
This is the first report of a setback for Roberts since he went to Baltimore's Minor League complex in Sarasota, Fla., last week. Roberts, who is rehabbing back from a herniated disk in his lower back, had reportedly been progressing at an encouraging rate, even coming to work out on his scheduled off-days.
Given the "minor setback," Roberts' original schedule, which worked up to a full game at second base June 10, could be altered. Former manager Dave Trembley had said that the hope was Roberts could start a rehab assignment following the full spring game.