To make ahead and freeze: In large bowl, mix melted butter, Worcestershire sauce, seasoned salt and garlic. Add chicken; toss to coat. Pour mixture into 1-gallon resealable food-storage plastic bag. In same bowl, mix tomatoes, soup and chiles; pour over chicken in bag. Seal bag, removing as much air as possible. Lay flat, and freeze up to 3 months. Thaw completely, 8 to 24 hours, in refrigerator. Spray 5-quart slow cooker with cooking spray. Pour thawed mixture into slow cooker. Follow steps 3 through 5.