Alvarez (shoulder) visited Dr. James Andrews on Thursday, Susan Slusser of the San Francisco Chronicle reports.
The visit to the esteemed doctor was Alvarez's second in as many days, as the player and team are still trying to determine what is wrong with his shoulder. Alvarez experienced soreness following his outing with Triple-A Nashville last weekend in what was just the latest in a series setbacks. His timetable to return to the major leagues has been pushed back indefinitely.