Callaway Golf has split with its ad agency, WPP Group's Y&R, according to Adweek. The trade magazine also said that earlier this year, director of marketing Scott White left Callaway to join Adidas brand TaylorMade.

Y&R handled only the Callaway-branded woods, irons, golf balls, brand marketing and women's products, an estimated $15 million piece of the company's overall business, according to Nielsen Monitor-Plus. The agency won the business in July 2004.