Rainey tossed a perfect two-thirds of an inning to earn the save in Wednesday's win over the Marlins.
The Marlins put three runs on the board off Washington reliever Ryne Harper to cut the Nationals' lead to 7-5 with one out in the ninth inning. Rainey was called upon to put out the fire, and he quickly induced groundouts from Miguel Rojas and Jazz Chisholm to secure his second save of the year. It's been a lost season for Rainey, who owns a 6.91 ERA in 35 appearances, but he has managed to provide three straight scoreless outings since returning from Triple-A Rochester.