Sunnyvale, Calif.--In a bid to strengthen its brand reach amid its grimmest period to date, Yahoo! Inc. has named John Costello as chief global marketing officer, a new position. Costello, most recently president-CEO of Internet sporting goods company MVP.com, will oversee all of Yahoo!'s strategic branding and marketing initiatives. Costello has held senior executive positions at companies including Nielsen Marketing Research USA, Sears, Roebuck & Co. and Procter & Gamble Co. Last month, Yahoo! reported a $24.1 million fiscal fourth-quarter net loss, compared with net income of $47.7 million in the year-earlier period.