During the 2008–09 season, Bayer 04 Leverkusen competed in the Bundesliga.
Season summary
Leverkusen dropped further down the table to finish 9th, failing to qualify for European competition for a second consecutive year. Manager Bruno Labbadia left Leverkusen at the end of the season for Hamburg, and was replaced by erstwhile Bayern Munich caretaker Jupp Heynckes.
^Sinkiewicz was born in Tychy, Poland, but also qualified to represent Germany internationally and represented Germany at U-19 and U-21 level before making his international debut for Germany in September 2005.
^Castro was born in Wuppertal, West Germany)(now Germany), and represented Germany at U-21 level, but also qualified to represent Spain internationally through his parents and represented Spain at U-19 level before making his international debut for Germany in March 2007.