Chavez has a strained right forearm, according to the A's media relations department.
"Eric's elbow flared up during batting practice," manager Bob Geren said. "We'll make a decision on him [Friday]. He's a potential candidate for the DL."
Chavez has not played since last Friday, and he has appeared in just three games since April 12. He's batting .100 this season.
Chavez was slated to play third base.
Todd Wills is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.