The Washington Nationals have designated Dan Butler for assignment to make room for Jonathan Papelbon on the 40-man roster, according to Mark Zuckerman of CSNWashington.com.
Also, minor news but Syracuse C Dan Butler DFA'd to clear space on 40-man roster for Papelbon.
— Mark Zuckerman (@MarkZuckerman) July 29, 2015
Butler, 28, was traded to the Nats from the Red Sox in January for Danny Rosenbaum. The catcher has little experience in the big leagues, hitting .211/.250/.368 in 20 plate appearances in 2014 for Boston. Butler has struggled in Triple-A this season with a slash of .231/.315/.312 with one homer and 20 RBIs in 253 plate appearances.