
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.”

Following last weekend’s big game against Wolfsburg, Bayer 04 Women face another exciting challenge as they visit Hoffenheim to kick off Matchday 3 in the Google Pixel Bundesliga on Friday (kick-off: 18:30 CEST).
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Under the slogan ‘Holidays without War’, 60 children from war-torn Ukraine took part in the summer camp organised by the German-Ukrainian association Blau-Gelbes Kreuz in Leverkusen and the surrounding area in August. The children aged between 10 and 14 – many of whom have lost their parents in the war – come from the Ukrainian twin towns of Leverkusen, Cologne and Monheim am Rhein: Nikopol, Dnipro and Volodymyr. Bayer 04, Bayer AG and TSV Bayer 04 supported the camp to mark its 10th anniversary, enabling even more children and young people than in previous years to spend a few carefree days’ holiday away from the war in the Rhineland.
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Midfielder Ruby Grant is leaving Bayer 04 Leverkusen and joining Portuguese runners-up Sporting CP a year before her contract expires. The 24-year-old has been at the Werkself since January 2025.
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Bayer 04 have loaned Brazilian full-back Arthur to Bundesliga side Werder Bremen for one year. Arthur Augusto de Matos Soares – the full name of the right-back – has a contract with Leverkusen until 30 June 2031. At Werder, the 23-year-old is expected to make an impact and help the long-established club further consolidate their position in the Bundesliga.
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