Ramón Jaime Martínez (born March 22, 1968) is a Dominican-American former pitcher in Major League Baseball.

He is the older brother of Hall of Fame pitcher Pedro Martínez, and is currently a senior advisor in Latin America for the Baltimore Orioles.

In his no-hitter, the only thing that kept him from a perfect game was a walk to Tommy Gregg with two outs in the 8th inning.

He was called up by the Red Sox in August, to pitch again alongside brother Pedro, making four starts for a 3–1 record with an ERA of 3.05.

Pedro went on to win three Cy Young Awards with the Expos and Red Sox, and was a first-ballot inductee to the Hall of Fame in 2015.