ルディ・フェラー
On 2 June 2016, amid speculation that Öztunalı would remain at Werder Bremen, Bayer Leverkusen director of football Rudi Völler confirmed that he would be returning to Leverkusen and would be part of the squad for the following season. Öztunalı amassed a total of 46 appearances across all competitions during his 18-month spell with Werder Bremen.