Bayer Giants Leverkusen is a professional basketball club, part of the TSV Bayer 04 Leverkusen sports club based in Leverkusen, Germany. It currently plays in ProA, the second division of German basketball.
Based on the number of titles, Bayer Leverkusen is the most successful team in the history of German Basketball with a record-14 championships and 10 Cups. In 2009, the Bayer company cut down sponsorship and the club went down to Germany's ProB (third division) to restructure. The license for the Basketball Bundesliga was transferred to the newly formed Giants Düsseldorf.