Latin Pork Back Ribs with Smoky Pineapple Mango Sauce

Name: Latin Pork Back Ribs with Smoky Pineapple-Mango Sauce
Ingredients: 3 pounds pork back ribs; Dry rub:; 2 tablespoons brown sugar; 2 teaspoons dried oregano leaves; 3/4 teaspoon ground cumin; 1/2 teaspoon salt; 1/4 teaspoon ground red pepper; Smoky pineapple-mango sauce:; 1/3 cup pineapple juice; 1/4 cup vegetable oil; 1/4 cup fresh lime juice; 3/4 cup fresh mango; 2 tablespoons fresh cilantro; 1 tablespoon chipotle peppers in adobo sauce; 1/2 teaspoon dried oregano leaves; 1/4 teaspoon salt; 1 clove garlic