The Washington Nationals activated right-handed closer Jonathan Papelbon from the disabled list on Monday.
Papelbon, 35, returns to the Nationals after missing 19 games with a right intercostal strain. The veteran appeared in three rehab games with Class A Potomac on June 27 and Double-A Harrisburg on Friday and Saturday. He threw a scoreless inning each time out, walking one and striking out three in the three innings pitched. He did not allow a hit.