In a large bowl, whisk the pineapple juice, soy sauce, chicken broth, brown sugar, ketchup, apple cider vinegar, ginger, and garlic. Reserve ½ cup for basting.
½ cup canned pineapple juice, ⅓ cup low-sodium soy sauce, ¼ cup brown sugar, ¼ cup ketchup, ¼ cup low-sodium chicken broth, 1 tbsp apple cider vinegar, 1 tsp grated fresh ginger, 2 cloves garlic