Major League Soccer tapped Dentsu America as its creative agency of record.

Optimedia US was named media agency of record for Boiron, a manufacturer of homeopathic products like Oscillococcinum and Arnicare. The assignment was awarded following a review. Optimedia US will handle general market strategic planning and buying for all of Boiron's products in the US through traditional channels, in addition to digital display and search. Media work was previously handled by Tierney.

Arnold and Mullen were awarded global creative work on various Albero Culver brands. Arnold New York was tapped to handle St. Ives, Noxzema and Nexxus brands, while Mullen's Winston-Salem office scored work on TRESemme.

Mindshare North America was awarded planning and implementation responsibilities for 21st Century Insurance and Financial Services. The assignment was awarded without a review and will be handled by Mindshare's New York office, which will begin work immediately.

Sports Authority placed creative and media chores on its $40 million advertising account in review. Post Central currently handles creative work and Deutsch handles media duties.

Blockbuster moved its advertising account from DDB to Euro RSCG.

Accenture placed creative chores for its $40 million account in review. Young & Rubicam currently handles the account.

Prudential Financial placed its U.S. advertising account, estimated at $85 million, in review.

Diamond Foods placed its creative account in review, parting ways with its lead agency, Goodby, Silverstein & Partners.

AMC placed its media buying and planning account in review. In addition, the network is looking for an agency to handle strategic positioning.