Washington Nationals' Bryce Harper takes batting practice during a spring training baseball workout, Wednesday, Feb. 25, 2015, in Viera, Fla. (AP Photo/David Goldman)
Washington Nationals' Bryce Harper, second from left, waits to take batting practice during a spring training baseball workout, Wednesday, Feb. 25, 2015, in Viera, Fla. (AP Photo/David Goldman)
Washington Nationals' Anthony Rendon, left, and teammate Emmanuel Burriss throw the ball during a spring training baseball workout, Wednesday, Feb. 25, 2015, in Viera, Fla. (AP Photo/David Goldman)
Washington Nationals right fielder Jayson Werth (28) warms up before Game 2 of baseball's NL Division Series against the San Francisco Giants at Nationals Park, Saturday, Oct. 4, 2014, in Washington. (AP Photo/Patrick Semansky)
Washington Nationals pitcher Stephen Strasburg tosses the ball in his hand before throwing to teammate Max Scherzer, rear, during a spring training baseball workout, Wednesday, Feb. 25, 2015, in Viera, Fla. (AP Photo/David Goldman)
Washington Nationals' Anthony Rendon throws to first base while fielding ground balls during a spring training baseball workout, Sunday, Feb. 22, 2015, in Viera, Fla. (AP Photo/David Goldman)
Washington Nationals pitcher Casey Janssen thaws the ball during a spring training baseball workout, Sunday, Feb. 22, 2015, in Viera, Fla. (AP Photo/David Goldman)
Washington Nationals manager Matt Williams, right, talks to fans through a fence during a spring training baseball workout, Sunday, Feb. 22, 2015, in Viera, Fla. (AP Photo/David Goldman)
Washington Nationals' Anthony Rendon throws to first base while fielding ground balls during a spring training baseball workout, Sunday, Feb. 22, 2015, in Viera, Fla. (AP Photo/David Goldman)
Washington Nationals pitcher Craig Stammen (35) throws against the San Francisco Giants in a baseball game in San Francisco, Thursday, June 12, 2014. (AP Photo/Jeff Chiu)
Washington Nationals left fielder Ryan Zimmerman (11) pauses in the dugout before a baseball game against the Miami Marlins at Nationals Park, Sunday, Sept. 28, 2014, in Washington. (AP Photo/Alex Brandon)
Washington Nationals shortstop Ian Desmond, right, pauses during an MLB baseball workout at Nationals Park, Thursday, Oct. 2, 2014, in Washington. The Washington Nationals play the San Francisco Giants in the National League Division Series starting Friday. (AP Photo/Alex Brandon)
Washington Nationals starting pitcher Taylor Jordan (38) pauses in the dugout before a baseball game against the St. Louis Cardinals at Nationals Park Thursday, April 17, 2014, in Washington. (AP Photo/Alex Brandon)
Washington Nationals manager Matt Williams, left, talks with pitching coach Steve McCatty during a spring training baseball workout, Sunday, Feb. 22, 2015, in Viera, Fla. (AP Photo/David Goldman)
Washington Nationals pitcher Gio Gonzalez, left, stretches with teammates during a spring training baseball workout, Sunday, Feb. 22, 2015, in Viera, Fla. (AP Photo/David Goldman)
Washington Nationals' Dan Uggla walks on the field during a spring training baseball workout, Sunday, Feb. 22, 2015, in Viera, Fla. (AP Photo/David Goldman)
Washington Nationals manager Matt Williams walks on the field in between interviews at the team's spring training baseball facility, Thursday, Feb. 19, 2015, in Viera, Fla. (AP Photo/David Goldman)
Washington Nationals manager Matt Williams walks on the field in between interviews at the team's spring training baseball facility, Thursday, Feb. 19, 2015, in Viera, Fla. (AP Photo/David Goldman)
Washington Nationals bullpen catcher Octavio Martinez, right, throws the ball to pitcher Doug Fister during an informal spring training baseball workout, Wednesday, Feb. 18, 2015, in Viera, Fla. (AP Photo/David Goldman)
Washington Nationals pitcher Doug Fister, right, leaves the field with bullpen catcher Octavio Martinez after an informal spring training baseball workout, Wednesday, Feb. 18, 2015, in Viera, Fla. (AP Photo/David Goldman)