Spray cold grate of gas grill with grilling spray. Preheat grill for medium heat.
Combine barbecue sauce with 2 tablespoons pineapple juice. Then combine 1/3 cup of the sauce mixture with the beef, breadcrumbs and steak seasoning in large bowl. Shape into 12 small patties.
Place pineapple slices in bowl with remaining barbecue sauce mixture and set aside.
Grill patties 3 to 4 minutes on each side or until cooked through. Meanwhile, remove attached rolls from package; do NOT separate. Cut in half horizontally. Spray cut sides with grilling spray; toast on grill.
Remove pineapple slices from sauce and grill for 1-2 minutes on each side.
Separate toasted rolls and assemble sliders; Spread remaining barbecue sauce mixture on rolls, place a small piece of lettuce then patties on bottom halves of rolls; top with cheese, bacon and pineapple. Close with tops of rolls. Enjoy!