The Washington Nationals have placed right-hander Luis Atilano on the 15-day disabled list, retroactive to July 21, because of bone chips in his pitching elbow.
Atilano, a 25-year-old rookie, is 6-7 with a 5.15 ERA in 16 starts this season.
Ross Detwiler, a 24-year-old left-hander, will be called up from Triple-A Syracuse to start Sunday in place of Atilano.
Detwiler was 2-2 with a 2.48 ERA in seven starts for Syracuse. It will be his third stint with Washington. He was 1-6 in 14 starts last season.
(This version Corrects spelling of Atilano in headlines)