Hands On: 30 minutes
Total: 2 hours 30 minutes
1. Combine ketchup, Worcestershire sauce, vinegar, honey, soy sauce and garlic in large resealable plastic bag; blend well. Pound chicken with meat mallet to even out thickness for more even cooking. Add chicken to bag; seal. Turn to coat evenly with ketchup marinade. Refrigerate 2 hours or overnight.
2. Spray cold grill and utensils with grilling spray. Preheat grill to medium heat. Combine drained tomatoes, pineapple, onion and cilantro in small bowl; set aside. Remove chicken from bag; discard marinade.
3. Grill chicken about 5 minutes on each side, or until no longer pink in center. Serve each breast with salsa.