Complex sentence: Mario Valenzuela Osuna (born March 10,1977 in Isla San Marcos, Baja California Sur, México) is a professional baseball outfielder for the Diablos Rojos del México of the summer Mexican Baseball League and the Algodoneros de Guasave of the Mexican Pacific League.
Split into simpler sentences: Mario Valenzuela Osuna (born March 10,1977 in Isla San Marcos, Baja California Sur, México) is a professional baseball outfielder. Valenzuela currently plays for the Diablos Rojos del México of the summer Mexican Baseball League and the Algodoneros de Guasave of the Mexican Pacific League.