Cover chicken with teriyaki sauce and place in zip bag. Marinate in frig for at least 30 minutes or can for several hours. Heat grill; grill chicken 4-5 minutes on 1st side, flip, continue cooking. Add cheese, cook until cheese is melted. Remove and set aside. Place sliced pineapple on grill and heat until caramelized, about 2 minutes per side. Place on top of chicken and add to buns. Top with red onion, jalapenos, and other desired topping.