Washington Nationals pitcher Ross Detwiler (48) works in the fifth inning against the New York Mets at Nationals Park in Washington, D.C. on Friday, August 17, 2012..Credit: Ron Sachs / CNP.(RESTRICTION: NO New York or New Jersey Newspapers or newspapers within a 75 mile radius of New York City)
RMD6B5D0Washington Nationals pitcher Ross Detwiler (48) works in the fifth inning against the New York Mets at Nationals Park in Washington, D.C. on Friday, August 17, 2012..Credit: Ron Sachs / CNP.(RESTRICTION: NO New York or New Jersey Newspapers or newspapers within a 75 mile radius of New York City)
Washington Nationals pitcher Ross Detwiler (48) works in the fifth inning against the New York Mets at Nationals Park in Washington, D.C. on Friday, August 17, 2012..Credit: Ron Sachs / CNP.(RESTRICTION: NO New York or New Jersey Newspapers or newspapers within a 75 mile radius of New York City)
RMJN12YJWashington Nationals pitcher Ross Detwiler (48) works in the fifth inning against the New York Mets at Nationals Park in Washington, D.C. on Friday, August 17, 2012..Credit: Ron Sachs / CNP.(RESTRICTION: NO New York or New Jersey Newspapers or newspapers within a 75 mile radius of New York City)
Washington Nationals pitcher Ross Detwiler pitches against the Chicago Cubs during the second inning at Nationals Park in Washington on July 5, 2011.  UPI/Kevin Dietsch
RMW0GD54Washington Nationals pitcher Ross Detwiler pitches against the Chicago Cubs during the second inning at Nationals Park in Washington on July 5, 2011. UPI/Kevin Dietsch
Philadelphia Phillies Chase Utley is out at first, as Washington Nationals pitcher Ross Detwiler takes the throw from first baseman Chris Marrero in the second inning during Game 2 of a doubleheader at Citizens Bank Park in Philadelphia, Pennsylvania on Tuesday, September 20, 2011. (Photo by Ron Cortes/Philadelphia Inquirer/MCT/Sipa USA)
RM2F0CYDYPhiladelphia Phillies Chase Utley is out at first, as Washington Nationals pitcher Ross Detwiler takes the throw from first baseman Chris Marrero in the second inning during Game 2 of a doubleheader at Citizens Bank Park in Philadelphia, Pennsylvania on Tuesday, September 20, 2011. (Photo by Ron Cortes/Philadelphia Inquirer/MCT/Sipa USA)
Washington Nationals pitcher Ross Detwiler throws in the first inning of their MLB game against the New York Mets in Washington, August 17, 2012.    REUTERS/Larry Downing  (UNITED STATES - Tags: SPORT BASEBALL)
RM2CX5FPKWashington Nationals pitcher Ross Detwiler throws in the first inning of their MLB game against the New York Mets in Washington, August 17, 2012. REUTERS/Larry Downing (UNITED STATES - Tags: SPORT BASEBALL)
Washington Nationals pitcher Ross Detwiler throws against the Philadelphia Phillies at Citizens Bank Park in Philadelphia, Pennsylvania, Tuesday, June 18, 2013. (Photo by Yong Kim/Philadelphia Daily News/MCT/Sipa USA)
RM2EYE20CWashington Nationals pitcher Ross Detwiler throws against the Philadelphia Phillies at Citizens Bank Park in Philadelphia, Pennsylvania, Tuesday, June 18, 2013. (Photo by Yong Kim/Philadelphia Daily News/MCT/Sipa USA)
Washington Nationals starting pitcher Ross Detwiler (48) bunts against the New York Mets during the second inning at Nationals Park in Washington, D.C, Friday, September 2, 2011. (Photo by Harry E. Walker/MCT/Sipa USA)
RM2F0BJR6Washington Nationals starting pitcher Ross Detwiler (48) bunts against the New York Mets during the second inning at Nationals Park in Washington, D.C, Friday, September 2, 2011. (Photo by Harry E. Walker/MCT/Sipa USA)
Washington Nationals left handed pitcher Ross Detwiler (48) works in the first inning against the Cincinnati Reds at Nationals Park in Washington, D.C. on Sunday, April 15, 2012.  All of the Reds and Nationals players are wearing number 42 in honor of Jackie Robinson Day..Credit: Ron Sachs / CNP
RMJN1RD2Washington Nationals left handed pitcher Ross Detwiler (48) works in the first inning against the Cincinnati Reds at Nationals Park in Washington, D.C. on Sunday, April 15, 2012. All of the Reds and Nationals players are wearing number 42 in honor of Jackie Robinson Day..Credit: Ron Sachs / CNP
Washington Nationals starting pitcher Ross Detwiler (48) delivers a pitch against the Baltimore Orioles during the first inning at Nationals Park in Washington, D.C, Saturday, May 19, 2012. (Photo by Harry E. Walker/MCT/Sipa USA)
RM2F033NTWashington Nationals starting pitcher Ross Detwiler (48) delivers a pitch against the Baltimore Orioles during the first inning at Nationals Park in Washington, D.C, Saturday, May 19, 2012. (Photo by Harry E. Walker/MCT/Sipa USA)
July 25, 2010 - Milwaukee, Wisconsin, United States of America - 25 July 2010:  Washington Nationals starting pitcher Ross Detwiler (48) throws during the first inning of the game between the Milwaukee Brewers and Washington Nationals at Miller Park in Milwaukee, Wisconsin.  The Brewers defeated the Nationals 8-3 to sweep the three game series.  Mandatory Credit: John Rowland / Sou
RMDJGKHJJuly 25, 2010 - Milwaukee, Wisconsin, United States of America - 25 July 2010: Washington Nationals starting pitcher Ross Detwiler (48) throws during the first inning of the game between the Milwaukee Brewers and Washington Nationals at Miller Park in Milwaukee, Wisconsin. The Brewers defeated the Nationals 8-3 to sweep the three game series. Mandatory Credit: John Rowland / Sou
Washington Nationals pitcher Ross Detwiler pitches against the Chicago Cubs during the second inning at Nationals Park in Washington on July 5, 2011.  UPI/Kevin Dietsch
RMW0GD4RWashington Nationals pitcher Ross Detwiler pitches against the Chicago Cubs during the second inning at Nationals Park in Washington on July 5, 2011. UPI/Kevin Dietsch
Washington Nationals' pitcher Ross Detwiler delivers a pitch against the Arizona Diamondbacks during their MLB baseball game in Phoenix, Arizona, August 12, 2012. REUTERS/Darryl Webb (UNITED STATES - Tags: SPORT BASEBALL)
RM2CWFC6PWashington Nationals' pitcher Ross Detwiler delivers a pitch against the Arizona Diamondbacks during their MLB baseball game in Phoenix, Arizona, August 12, 2012. REUTERS/Darryl Webb (UNITED STATES - Tags: SPORT BASEBALL)