Sitting at 27-35 with the Pittsburgh Pirates coming into town, the Nationals were in drastic need of a series win.
All season long, Corbin had failed to locate his fastball and slider with ease, leading to his down year.
He only allowed one run, an RBI double in the seventh, but he ended the threat by striking out the next guy to end the inning.
Mercer got the nod at third and was able to hurt his former team from both sides of the plate.
In the sixth inning, he hit his first triple of the season, which scored Robles to put the Nats up 6-0.
Undoubtedly, Gomes had the biggest swing of the night, launching a first-inning fastball 400 feet for a grand slam, to put the Nats up 5-0.