WASHINGTON -- The Reds activated left-hander Sean Marshall from the disabled list on Friday and put Manny Parra on the 15-day DL.
Marshall had been on the DL since April 10 with shoulder tendinitis and was eligible to come off April 23, but the Reds didn't give the word until they were taking batting practice for Friday's game.
Marshall threw twice on rehab assignments this week and fared well before re-joining the team on Thursday in Washington.
Marshall last pitched on Wednesday for Triple-A Louisville, throwing 18 pitches in one inning. He said Thursday that he threw all of his pitches and felt fine.
He had pitched in just one game this season -- against the Nationals -- before going on the DL. Left-hander Parra went on the DL with a pectoral muscle strain (left), retroactive to Wednesday.
Jeff Seidel is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.