PREHEAT grill to medium-high heat. Tear off a sheet of Reynolds Wrap® Non-Stick Foil long enough to cover entire grill grate. Make drainage holes in the non-stick foil with a grilling fork set aside.
COMBINE barbecue sauce and teriyaki sauce set aside. Combine ground beef, red onion, garlic salt, pepper and 1/2 cup barbecue sauce mixture in large bowl until well blended. Shape beef mixture into 8 burgers, 4 inches round and 1/2-inch thick.
PLACE foil sheet with holes on grill grate with non-stick (dull) side facing up. Immediately place burgers and pineapple slices on foil.
GRILL burgers and pineapple uncovered 5 minutes turn. Brush burgers with remaining barbecue sauce grill 5 minutes.
Remove pineapple slices from foil. Turn burgers brush with barbecue sauce. Grill 3 minutes longer or until burgers are done.
Lightly toast hamburger buns on grill. Top burgers with 1 slice cheese before removing from grill. Place burgers on buns top with grilled pineapple slices. Serve on onion rolls with additional barbecue sauce and lettuce, if desired.