Lawyers are seeking class-action status for a lawsuit that claims Hall of Fame slugger George Brett has been falsely advertising bracelets and necklaces as being able to help improve health and sports performance.

A lawsuit filed Monday in federal court in Des Moines claims Spokane Valley, Wash.-based Brett Bros. Sports International, Inc. has falsely claimed the products help customers relieve stiffness, recover from sports fatigue and improve focus.

An Iowa man, Seth Thompson of Adel, says he bought one of the necklaces at the College World Series in Omaha but did not receive any of those benefits.

His lawyers are asking a federal judge to approve a class-action lawsuit on behalf of all customers who have bought the products in the last four years.

The company had no immediate comment.