Roy Oscar "Doc" Miller (February 4, 1883 – July 31, 1938) was a Major League Baseball outfielder from 1910-1914.

He played for the Chicago Cubs, Boston Braves, Cincinnati Reds, and Philadelphia Phillies.

Miller was posthumously inducted into the Canadian Baseball Hall of Fame in 2009.

He finished his career with a .958 fielding percentage at all three outfield positions.

This biographical article relating to a Canadian baseball outfielder is a stub.