Black and the club are hopeful the the results will show enough progress to return to the batting cages soon.
Alonso has been on the 15-day disabled list since June 6. He suffered the injury when he was hit by a pitch in the seventh inning of the Padres' 17-inning, 4-3 victory over the Blue Jays on May 31.
Joe Morgan is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.