Peter R. Morris was a Major League Baseball shortstop in 1884 for the Washington Nationals of the Union Association. He played one game for them, going 0-for-3. He also played for the Milwaukee team in the Northwestern League in 1883 and 1884. He was killed in a railroad accident in December, 1884. At the time of his death, he was a resident of Ixonia, Wisconsin.

Morris is the first of only three men born in Wales to play in the major leagues to date. The others were Jimmy Austin and Ted Lewis.