Springdale, Arkansas-based Tyson Foods, the world's largest processor and marketer of beef, chicken and pork, is to expand the use of the Tyson brand into other proteins and product categories. The Tyson brand will replace the Thomas E. Wilson brand on roasts and other further processed beef and pork products and case ready pork. Tyson will initially convert all Thomas E. Wilson branded case ready beef to clear film packaging with no brand affiliation. These conversions will begin immediately and should be completed over the next six months, depending on the product category.