In a large bowl, combine pineapple juice, oil, lime juice, sugar, Worcestershire, cumin, chili powder, smoked paprika, salt, pepper, and garlic. Whisk well until combined.
In a large zip closure bag, add chicken and the marinade. Refrigerate for one hour or overnight.
Preheat oven to 400℉. Lightly spray a 13x19 inch baking pan.
In a large bowl, toss together peppers, onion, and pineapple. Season with salt and pepper or whatever your family likes (I often do a packet of fajita seasoning).
Transfer chicken from bag to the bowl with the veggies using tongs, leaving behind extra liquid form the marinade.
Toss veggies and chicken together.
Transfer to prepared baking sheet and bake for 30-40 minutes, tossing once halfway through cooking.
Serve with corn tortillas, queso fresco, and cilantro.