Ramón Antonio Fermín Ventura (born November 25, 1972 in San Francisco de Macorís, Dominican Republic) is a former professional baseball relief pitcher. He played in one game in Major League Baseball for the Oakland Athletics during the 1995 season. Listed at 6' 3", 180 lb., he batted and threw right-handed. In 1.1 innings of work, Fermín gave up four hits, two runs and a walk for a 13.50 ERA. He did not have a decision.