More photos » by Evan Vucci - AP

5 months ago: Washington Nationals starting pitcher Scott Olsen stretches his arm during the third inning of a baseball game against the Philadelphia Phillies on Saturday, May 16, 2009 in Washington. Olsen had an MRI on his throwing shoulder following Saturday's 8-5 loss to the Phillies, another setback for the worst pitching staff in the National League.(AP Photo/Evan Vucci)

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As you all know by now, 2007 first round pick Ross Detwiler will make his first big league start tonight against the Pittsburgh Pirates.  He replaced the injured Scott Olsen, hopefully for quite some time.  The press release from the team is below the starting lineups.

PITTSBURGH PIRATES (16-21; 6th in NL Central-6.5 back; two-game win streak):

Young - RF
Sanchez - 2B
McLouth - CF
Monroe - LF
Adam LaRoche - 1B
Diaz - C
Andy LaRoche - 3B
Wilson - SS
Ohlendorf - P

WASHINGTON NATIONALS (11-25; 5th in NL East-10 games back; four-game loss streak):

Guzman - SS
Johnson - 1B
Zimmerman - 3B
Dunn - RF
Willingham - LF
Harris - CF
Hernandez - 2B
Bard - C
Detwiler - P

STARTING PITCHERS:

PIT: Ross Olhendorf (43.0 IP, 4-3, 3.77 ERA, 22 Ks, 9 BBs)
WAS: Ross Detwiler (2009 debut, first major league start)

WEATHER:

Clear. Calm. Chilly. First pitch: 58F. Last out: 53F. No chance of rain. WOO HOO!!!

NOTES

Nats starter Jordan Zimmermann appeared at ESPNZone today at lunchtime for a fan Q&A, moderated by Charlie Slowes, play-by-play voice of the Nationals. He took fan questions, answered some canned questions from Charlie, and fans answered trivia for free tickets.

Pitcture courtesy of C. Nichols, Nats News Network.  All rights reserved.

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.