Rafael Emilio Valdez Díaz (born December 17, 1967) is a former Major League Baseball pitcher.

He played for the San Diego Padres in 1990.

Valdez began his professional career as a shortstop, playing two seasons at that position with the Charleston Rainbows in 1986–87.

In 1989, Valdez pitched a perfect game for the Riverside Red Wave.

This biographical article relating to a Dominican Republic baseball pitcher is a stub.