Between 2014 and 2016 Maas, who played for Arminia Bielefeld and Hertha Berlin in the Bundesliga plus MSV Duisburg in the second division, was assistant coach to the current Bayer 04 head coach Peter Bosz. They were in charge at Dutch club Vitesse Arnhem for a total of 62 games in the Eredivisie. “In Rob Maas, we’ve appointed an innovative and strong-minded assistant coach who fits in really well here. He knows the Bundesliga and has already worked successfully with Peter Bosz. Rob will provide new ideas,” declared sporting director Simon Rolfes.
For Rob Maas, Bayer 04 are “a highly ambitious and very attractive club. That’s not just the perception in Germany but Leverkusen also have an outstanding reputation across Europe,” said Maas. “To be able to work with fellow coaches in developing an extremely exciting team is a fantastic challenge I’m really looking forward to.”
The sustainable use of the BayArena seats removed as part of the current stadium upgrade has taken on a new dimension: Following on from numerous Bayer 04 fans receiving their ‘Undefeated Champions seats’ and various clubs and community organisations from Leverkusen and the wider region having collected the dismantled seats, Blau-Gelbe Kreuz e.V. also made their way to the BayArena recently. The German-Ukrainian aid organisation took away around 2,100 seats; in Ukraine, these will be used to upgrade the sports infrastructure of two clubs.
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Bayer 04 have transferred U19 midfielder Emmanuel Chigozie Owen to FC Utrecht in the Eredivisie.
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Bayer 04 Leverkusen have extended youngster Montrell Culbreath's contract once again. Having only signed a deal with the Bundesliga club until 30 June 2030 in January, still as an U19 player, the attacking midfielder, who's since established himself in the first-team squad, has penned a new contract valid until 30 June 2031. Culbreath joined the Werkself academy in 2023 and made 16 first-team appearances in the 2025/26 season in the Bundesliga, DFB Pokal and Champions League, scoring one goal.
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Ecuador international Piero Hincapie, who moved to Arsenal FC on loan from Bayer 04 Leverkusen for the 2025/26 season, will join the English champions permanently on 1 July 2026.
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