Bayer 04 Leverkusen, officially known as Bayer 04 Leverkusen Fußball GmbH and commonly known as Bayer Leverkusen or simply Leverkusen, is a German professional football club based in Leverkusen, North Rhine-Westphalia. From Wikipedia
The Switzerland captain brings top-flight pedigree to Sunderland in a move aimed at strengthening the squad for relegation battles.
