Arturo Marcelino DeFreites Simon (born April 26, 1953) is a former professional baseball first baseman. He played parts of two seasons in Major League Baseball, 1978 and 1979, for the Cincinnati Reds.
Following his major league career, DeFreites played in the Mexican League from 1980 until 1986. He was also a minor league baseball manager for the Gulf Coast League Expos in 2004 and the Dorados de Chihuahua in 2009.