WASHINGTON -- The Nationals voided Aaron Barrett's option and placed him on the 15-day disabled list with a right elbow strain, the club announced Sunday.
"He's going to go get some tests," manager Matt Williams said after the Nationals' 6-4 loss Sunday. "We decided to option him, and then he let us know that his elbow was bothering him. He didn't let us know anything until then. So, since then we've scheduled some tests and put him on the DL to ensure that we take a look at it."
Barrett was sent to Triple-A Syracuse on Thursday in a corresponding move with the recall of Blake Treinen, one day after giving up three runs in one-third of an inning against the D-backs. This will be Barrett's second stint on the DL this season, also missing time in June with a right biceps strain.
Prior to his outing against Arizona, Barrett had made nine scoreless appearances. The right-hander is 3-3 with a 4.60 ERA in 40 games with the Nationals this season.
Connor Smolensky is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.