Harper revealed last week that he's been playing through a sore wrist and sore right elbow, MLB.com reports.
Harper was seen wincing after taking a swing in Tuesday's win over the Blue Jays, but he stayed in that game and is back in the lineup Wednesday. Phillies manager Rob Thomson said that Harper's elbow "grabs a little bit" on swings and misses, but he said his first baseman is "fine" and there are no current plans to give him rest. Harper noted last week that he's battled wrist soreness since May, while the elbow issue is more recent. He's slashing .307/.373/.465 since Aug. 1 but hasn't homered since Aug. 9.