Washington Nationals' Bryce Harper eyes the ball during batting practice before the game against the Arizona Diamondbacks at Nationals Park in Washington on Tuesday, May 1, 2012. (AP Photo/Susan Walsh)

Photo by: Susan Walsh

Washington Nationals' Bryce Harper eyes the ball during batting practice before the game against the Arizona Diamondbacks at Nationals Park in Washington on Tuesday, May 1, 2012. (AP Photo/Susan Walsh)