Richard Brett Campbell (born October 17, 1981) is an American former professional baseball pitcher.

He played in Major League Baseball (MLB) for the Washington Nationals.

He began the 2004 season playing for their rookie league affiliate, the GCL Expos.

He started 2006 with the Potomac Nationals and was then promoted to the Double-A Harrisburg Senators and then the Triple-A New Orleans Zephyrs.

Following his playing career, he became a scout in the Texas Rangers organization.