The riddle that is Henderson Alvarez’s right shoulder jumped back into the forefront with the A’s Sunday with the news that he had more shoulder pain during what was supposed to be his final injury rehabilitation assignment start Saturday night in Nashville.
After pitching three innings without difficulty, Alvarez went out to start the fourth inning against Round Rock and felt a recurrence of the shoulder pain that has plagued him off and on. He had shoulder surgery last July and then in what was supposed to be his last rehab start May 15 had to be shut down after five innings.