If Andrews confirms the diagnosis, Eaton will take the next three weeks off to rest and strengthen the elbow before being reevaluated.
Eaton initially felt the discomfort in March and was shut down at that point. He had recently begun playing in the field and was likely just days away from being activated from the disabled list when he experienced discomfort again.
"It is kind of starting all over again, but you're stepping forward, you're not taking any steps back," Eaton said. "It's a three-week period where I can continue to get stronger and learn from this. As tough as it is and as young as I am, I haven't ever tasted any kind of adversity like this before, so it's definitely going to be a learning process for me to kind of take a step back and learn day-to-day how I can be patient and get healthy."
Steve Gilbert is a reporter for MLB.com. Read his blog, Inside the D-backs, and follow him on Twitter @SteveGilbertMLB. This story was not subject to the approval of Major League Baseball or its clubs.