Washington Nationals starting pitcher Jordan Zimmermann throws to first base in a pickoff attempt of New York Mets' Eric Young Jr. in the first inning of an exhibition spring training baseball game, Thursday, March 27, 2014, in Port St. Lucie, Fla. (AP Photo/David Goldman)
Washington Nationals' Jordan Zimmermann singles to score teammate Wilson Ramos in the second inning of an exhibition spring training baseball game against the New York Mets, Thursday, March 27, 2014, in Port St. Lucie, Fla. (AP Photo/David Goldman)
Washington Nationals starting pitcher Jordan Zimmermann plays in the first inning of an exhibition spring training baseball game against the New York Yankees, Tuesday, March 11, 2014, in Viera, Fla. (AP Photo/David Goldman)
Washington Nationals starting pitcher Jordan Zimmermann plays an exhibition spring training baseball game against the New York Yankees, Tuesday, March 11, 2014, in Viera, Fla. (AP Photo/David Goldman)
Washington Nationals starting pitcher Jordan Zimmermann, right, throws to New York Yankees' Mark Teixeira in the first inning of an exhibition spring training baseball game, Tuesday, March 11, 2014, in Viera, Fla. (AP Photo/David Goldman)
Washington Nationals starting pitcher Jordan Zimmermann, right, throws to New York Yankees' Mark Teixeira in the first inning of an exhibition spring training baseball game, Tuesday, March 11, 2014, in Viera, Fla. (AP Photo/David Goldman)
Washington Nationals starting pitcher Jordan Zimmermann throws in the first inning of a spring exhibition baseball game against the Atlanta Braves, Thursday, March 6, 2014, in Kissimmee, Fla. (AP Photo/Alex Brandon)
Washington Nationals starting pitcher Jordan Zimmermann (27) throws in a spring exhibition baseball game against the Atlanta Braves, Saturday, March 1, 2014, in Viera, Fla. (AP Photo/Alex Brandon)
Washington Nationals starting pitcher Jordan Zimmermann (27) warms up in a spring exhibition baseball game against the Atlanta Braves, Saturday, March 1, 2014, in Viera, Fla. (AP Photo/Alex Brandon)
Washington Nationals starting pitcher Jordan Zimmermann throws in the first inning of a spring exhibition baseball game against the Atlanta Braves, Saturday, March 1, 2014, in Viera, Fla. (AP Photo/Alex Brandon)
Washington Nationals starting pitcher Jordan Zimmermann throws in the first inning of a spring exhibition baseball game against the Atlanta Braves, Saturday, March 1, 2014, in Viera, Fla. (AP Photo/Alex Brandon)
This is a 2014 photo of pitcher Jordan Zimmermann of the Washington Nationals baseball team. This image reflects the Nationals active roster as of, Sunday, Feb. 23, 2014, when this image was taken. (AP Photo/Alex Brandon)