1. Cut the ham, yellow and orange bell peppers, onion and pineapple in 2" pieces. Slide the pieces onto the skewers alternating ham, peppers, onion, mushroom and pineapple.
2. Mix the pineapple juice, brown sugar, ketchup, Worcestershire, garlic and pepper together in a small bowl. Brush evenly on both sides of the skewers.
3. Grill on medium-high heat, searing each side for about 5 minutes or until all ingredients are heated through. Brushing more sauce on with each turn.