Mix together teriyaki sauce and 1/2 cup pineapple juice (from pineapple rings). Marinade chicken in 1 cup of teriyaki, pineapple mixture. Cook bacon until crisp. Grill chicken until cooked add cheese for the last few minutes to allow cheese to melt. Place pineapple on the grill and grill for about 5 minutes. Toast hamburger buns. To assemble place chicken, bacon, pineapple, lettuce and onion on hamburger bun.