Washington Nationals shortstop Ian Desmond, right, chases outfielder Jayson Werth, left, during a spring training baseball workout Tuesday, Feb. 19, 2013, in Viera, Fla. (AP Photo/David J. Phillip)
Washington Nationals shortstop Ian Desmond, right, chases outfielder Bryce Harper, left, during a spring training baseball workout Tuesday, Feb. 19, 2013, in Viera, Fla. (AP Photo/David J. Phillip)
Washington Nationals third baseman Carlos Rivero throws during a spring training baseball workout Tuesday, Feb. 19, 2013, in Viera, Fla. (AP Photo/David J. Phillip)
Washington Nationals third baseman Ryan Zimmerman fields a ground ball during a spring training baseball workout Tuesday, Feb. 19, 2013, in Viera, Fla. (AP Photo/David J. Phillip)
Washington Nationals shortstop Ian Desmond, left, tosses the ball to second during a spring training baseball workout Tuesday, Feb. 19, 2013, in Viera, Fla. (AP Photo/David J. Phillip)
Washington Nationals outfielder Denard Span takes batting practice during a spring training baseball workout Tuesday, Feb. 19, 2013, in Viera, Fla. (AP Photo/David J. Phillip)
Washington Nationals manager Davey Johnson, right, talks with Denard Span, left, during a spring training baseball workout Tuesday, Feb. 19, 2013, in Viera, Fla. (AP Photo/David J. Phillip)
Washington Nationals, from left to right, Jayson Werth, Bryce Harper, Danny Espinosa and Ryan Zimmerman stretch during a spring training baseball workout Tuesday, Feb. 19, 2013, in Viera, Fla. (AP Photo/David J. Phillip)
Washington Nationals outfielder Corey Brown catches a ball as part of a drill during a spring training baseball workout Tuesday, Feb. 19, 2013, in Viera, Fla. (AP Photo/David J. Phillip)
Washington Nationals pitcher Rafael Soriano throws during a spring training baseball workout Tuesday, Feb. 19, 2013, in Viera, Fla. (AP Photo/David J. Phillip)
Washington Nationals third baseman Ryan Zimmerman stretches during a spring training baseball workout Tuesday, Feb. 19, 2013, in Viera, Fla. (AP Photo/David J. Phillip)
Washington Nationals outfielder Jayson Werth, right, tries to avoid infielder Steve Lombardozzi, left, as part of a rundown drill during a spring training baseball workout Tuesday, Feb. 19, 2013, in Viera, Fla. (AP Photo/David J. Phillip)
Washington Nationals outfielder Jayson Werth, right, prepares to run from first to second as part of a rundown drill during a spring training baseball workout Tuesday, Feb. 19, 2013, in Viera, Fla. (AP Photo/David J. Phillip)
Washington Nationals infielder Danny Espinosa, right, tosses the ball as he chases Roger Bernadina (33) as part of a rundown drill during a spring training baseball workout Tuesday, Feb. 19, 2013, in Viera, Fla. (AP Photo/David J. Phillip)
Washington Nationals outfielder Jayson Werth catches a ball as part of a drill during a spring training baseball workout Tuesday, Feb. 19, 2013, in Viera, Fla. (AP Photo/David J. Phillip)
Washington Nationals manager Davey Johnson, right, talks with outfielder Denard Span, left, during a spring training baseball workout Tuesday, Feb. 19, 2013, in Viera, Fla. (AP Photo/David J. Phillip)
Washington Nationals outfielder Denard Span adjusts his cap during a spring training baseball workout Sunday, Feb. 17, 2013, in Viera, Fla. (AP Photo/David J. Phillip)
Washington Nationals first baseman Adam LaRoche, right, talks with outfielder Bryce Harper, left, during a spring training baseball workout Sunday, Feb. 17, 2013, in Viera, Fla. (AP Photo/David J. Phillip)
Washington Nationals outfielder Jayson Werth licks his lips during a spring training baseball workout Sunday, Feb. 17, 2013, in Viera, Fla. (AP Photo/David J. Phillip)
Washington Nationals shortstop Ian Desmond tosses the ball to first during a spring training baseball workout Sunday, Feb. 17, 2013, in Viera, Fla. (AP Photo/David J. Phillip)