Mario Martin Ramos (born October 19, 1977) is an American former Major League Baseball pitcher.

On January 14, 2002, he was traded to the Texas Rangers along with Jason Hart, Gerald Laird and Ryan Ludwick for Carlos Peña and Mike Venafro.

At the end of 2003, he was selected off waivers from the Rangers by the team who drafted him, the Oakland Athletics.

Even though he was rumored to be part of a deal being concocted between the Los Angeles Dodgers and Athletics for Milton Bradley, he was not traded, and he remained in the Athletics' farm system.

His cousin, Dominic Ramos, also plays professional baseball.