Umbro's previous chief executive Steve Makin stepped down yesterday after Nike completed its takeover of the sportswear brand.
Lee Bird, president of Nike's subsidiary brands, said: "We understand Steve's decision and would like to wish him the very best for the future. There is real passion and commitment to driving the brand forward among the whole team at Umbro and Matthew Cook will provide the leadership to grow the business over the coming years, as well as integrating where required with the Nike brand."
Makin, who joined Umbro in 2006 and was promoted to chief executive in June 2007, said in a statement: "Now is the right time for me to move onto another challenge. Umbro is a hugely exciting global brand and the business is in great shape for continued growth and development."
Nike has brought the Umbro brand in an attempt to strengthen its position in the football market where rival Adidas has gained ground.