Wong was 0-for-3. He hit a grand slam off James Shields on Tuesday, but jammed his shoulder later in that game.
"There's no tear or anything structurally bad, but I bruised it pretty good," Wong said. "It's tough because I want to be in there."
Wong said there's pain when he tries to complete his swing or make a quick motion to take off running.
"It's just inflammation," Wong said. "Hopefully, I'm not out too long. That last at-bat, I knew I had re-aggravated it."
Robert K=Falkoff is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.