Spray inside of 4-quart slow cooker with cooking spray. Place all ingredients in slow cooker. Cover; cook on low 8 hours or on high 4 hours or until beef is tender.
Discard bay leaf. Remove beef from slow cooker; pull into shreds with 2 forks. Return beef to slow cooker; stir to combine with sauce.
Notes
Leftovers can be frozen up to 3 month in the back of your freezer.