Nationals recall Ross Detwiler from Double-A Harrisburg, place Scott Olsen on DL

The Washington Nationals today recalled left-handed pitcher Ross Detwiler from Harrisburg of the Double-A Eastern League and placed left-handed pitcher Scott Olsen on the 15-Day Disabled List, retroactive to May 17, with left shoulder tendinitis. Nationals Assistant General Manager and Vice President of Baseball Operations Mike Rizzo made the announcement.

Detwiler is slated to make his first big-league start in tonight's series opener against Pittsburgh. The Nationals' first-round (sixth overall) selection in the 2007 First-Year Player Draft, he started six contests and logged a team-best 28 strikeouts with a 2.96 ERA this season at Harrisburg. Detwiler posted a 1.20 ERA (2 ER) and 4.5/1 strikeout-to-walk ratio (18 K/4 BB) in 15.0 innings pitched during his last three starts.

The 23-year-old entered this season ranked the No. 2 prospect in the Nationals organization, per Baseball America. He made his big-league debut - a 1.0-inning relief appearance at Atlanta on September 7, 2007 - three months after he was drafted, becoming the first player from the '07 Draft to reach the majors. Detwiler has compiled a 10-13 record with a 4.34 ERA in 41 career minor league contests (40 starts).

Olsen, 25, is 1-4 with a 7.24 ERA in eight starts this season with Washington.