Nationals place Aaron Barrett on 15-Day DL with bicep strain, activate David Carpenter

Washington Nationals' right-hander Aaron Barrett gave up a run on a walk and a hit in the eighth inning of last night's loss to the Brewers in Milwaukee's Miller Park, but he was lifted from the game after a mound visit from skipper Matt Williams, pitching coach Steve McCatty and the Nationals' trainer.

Williams said after the game that there was no report immediately available.

"We don't have any information yet, we'll know more tomorrow," Williams said.

"He was uncomfortable," the Nats' manager explained, so they went out to talk to him and made the decision to take the ball from Barrett. "We'll see how he is tomorrow."

The Nationals announced this afternoon that the right-hander was being placed on the 15-Day DL with a right bicep strain.

Taking his place on the roster is right-hander David Carpenter, 29, who was acquired by the Nats from the Yankees on Thursday afternoon in a trade that sent 24-year-old prospect Tony Renda to New York.

Barrett, 27, appeared in 30 of the Nationals' first 60 games this season, posting a 5.06 ERA, a 2.21 FIP, six walks (2.53 BB/9) and 28 Ks (11.81 K/9) in 21 ⅓ IP, over which opposing hitters have a .244/.311/.354 line.

Carpenter was designated for assignment by the Yankees on June 3rd after putting up a 4.82 ERA, a 5.30 FIP, seven walks (3.38 BB/9) and 11 Ks (5.30 K/9) in 22 games and 18 ⅔ IP, with a .270/.354/.514 line against so far this season.

The #Nats have activated RHP David Carpenter and placed RHP Aaron Barrett on the 15-day DL with a right bicep strain.

— Washington Nationals (@Nationals) June 12, 2015