Mar 29, 2010 5:11 PM EST
Barack Obama will throw out the ceremonial first ball at the Nationals' opener, marking the 100th anniversary of a presidential pitch to start the season.
William Howard Taft first did it on April 14, 1910.
This will be the 48th time a president has made an opening-day pitch in the nation's capital.
The Nationals will open the season on April 5th against the Phillies.
Via ESPN
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