It is due to a scheduling conflict, The Washington Post reported.
The tradition of the president throwing out the first pitch at Washington's opening-day game started more than 100 years ago , when President William Howard Taft threw out the first pitch for the then-Washington Senators in 1910, ESPN reported.
In recent history, George W. Bush and Barack Obama threw out ceremonial first pitches on opening day.
Overall, 13 presidents been part of the ceremony either for the Senators or the Nationals.
There is no word on who will have the honor of throwing out the first pitch.
Nats all-star pitcher Stephen Strasburg is scheduled to start for Washington. Edinson Volquez is the starter listed for the Marlins.
The first pitch is scheduled for 1:05 p.m. ET on Monday.
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