Place roast in slow cooker.
Place rosemary in bay leaves in a piece of cheesecloth and gather it up and tie with twine/string.
Add remaining ingredients.
Cook on Low for 8 to 10 hours.
Remove bay leaves and rosemary and discard.
Remove and shred beef.
Strain juices to serve as Au Jus.
Return everything to crock pot on warm and serve.
If you like, you can sauté onions and peppers and add cheese to the sandwiches.