"[Harper's] got a little stomach issue going, and I rather have him be available to come off the bench," Martinez said. "I don't know how far he can actually play, but if he can come off the bench and help us that way, that'd be good."
Harper did appear as a pinch-hitter on Tuesday. He hit for reliever Justin Miller in the seventh inning and struck out against Brewers reliever Jeremy Jeffress.
Harper went 0-for-3 with a strikeout and a walk in Washington's loss to Milwaukee on Monday night. Over the past eight days, Harper has won the T-Mobile Home Run Derby and participated in the All-Star Game presented by Mastercard.