Washington Nationals pitcher Jordan Zimmerman, left, reacts as he relieved by manager Jim Riggleman, center, during the seventh inning of a baseball game with the Philadelphia Phillies at Nationals Park on Thursday, April 14, 2011 in Washington. The Phillies won 4-0.(AP Photo/Alex Brandon)
Nationals manager Jim Riggleman greets his players on the field at the start of the opening day game against the Atlanta Braves at Nationals Park, in Washington, D.C., Thursday, March 31, 2011. (Drew Angerer/The Washington Times)
ASSOCIATED PRESS Washington Nationals manager Jim Riggleman, center, gestures after a bench-clearing brawl during the sixth inning of a baseball game against the Florida Marlins, Wednesday, Sept. 1, 2010, in Miami.