In a separate bowl, combine egg, mustard, lemon juice and Worcestershire sauce. Whip with a whisk until smooth. Pour egg mixture over the crabmeat and crackers and gently mix careful not to break up large lumps of crabmeat.
Mold into golfball sized balls and place on a cookie sheet. Bake at 350 degrees Fahrenheit for 30 minutes. Drizzle with melted butter and allow to cool, serving with saltine crackers.