The Philadelphia Phillies activated outfielder Aaron Altherr from the disabled list on Wednesday but placed outfielder Daniel Nava on the 10-day disabled list.
Altherr is returning from a right hamstring injury earlier than expected. Assistant general manager Scott Proefrock had said July 19 that Altherr was expected to miss three to four weeks.
Nava is going on the disabled list with a left hamstring strain. He suffered the injury on Friday night and had missed the Phillies' past four games.
Altherr led the Phillies in batting average (.