Eric Rothfeld is to step into Mindy Grossman's shoes as Polo Jeans Co's chief following Grossman's departure to Nike.Rothfeld will continue as president of the Sun Apparel subsidiary of Jones, of which Polo Jeans is a part, and a director of the parent company.Sun already held the license for the Polo jeanswear business when it was acquired by Jones from Rothfeld and Vestar Capital Partners, a New York-based private equity investment firm, in October 1998 for $445.1m. As Jones was already the licensee for Lauren by Ralph Lauren sportswear, the deal brought together two of Polo Ralph Lauren's most visible and successful licensees.