It seems that Storen didn’t have just a run-of-the-mill cough or cold, though. According to the Washington Post, he had pitched with the flu. The reliever was struggling so badly that he received an IV during the game’s early innings:
New detail about Drew Storen's performance today: His flu was so bad he received an IV during the early innings. http://t.co/nTtodUFxhe
Storen, who entered the game with the Nationals already trailing 8-0, gave up three hits, including a three-run homer, in 2/3 of an inning pitched and was subsequently optioned to Triple-A Syracuse later Friday night.
The move was based on more than this one outing, of course, but Nationals teammate Tyler Clippard nevertheless didn't take too kindly to the news.