The Nationals selected Blankenhorn's contract from Triple-A Rochester on Tuesday.
EDGE Analysis
With Lane Thomas and Jesse Winker now out of the picture, the Nationals will give one of the open outfield spots to Blankenhorn, who has slashed .246/.328/.518 with 24 homers and 69 RBI through 401 Triple-A plate appearances on the season. The 27-year-old is capable of fielding either of the corner outfield positions, though with James Wood in left field, most of Blankenhorn's time will likely be spent competing with Alex Call for reps in right.