
Tanner Roark had done his job as the starter, giving up two runs on four hits in six innings, and he left with the game tied at 2-2 after an RBI single in the top of the seventh by Michael Taylor.
Aaron Barrett (3-1) relieved Roark, and gave up the tie-breaking RBI single to Brandon Phillips that opened up the floodgates for the Reds, who also got an RBI double from Todd Frazier, a two-run double from Jay Bruce, and run-scoring singles from Brennan Boesch and Tucker Barnhart in the frame.
The Nats (28-22) maintain a one-game lead over the New York Mets in the National League East, and return home Monday to start a three-game series with the Toronto Blue Jays.