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.”
Four Bayer 04 players are in action at the 35th edition of the Africa Cup of Nations being played in Morocco from 21 December to 18 January 2026: Eliesse Ben Seghir for the hosts, Edmond Tapsoba with Burkina Faso, Ibrahim Maza for Algeria and Christian Kofane with Cameroon. Updates on the AFCON matches involving Werkself players...
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Werkself TV shows the highlights of Bayer 04's 1-4 loss against VfB Stuttgart on Matchday 16 of the 2025/26 Bundesliga season...
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The Werkself began 2026 with defeat, losing 4-1 at home to VfB Stuttgart on Matchday 16 of the 2025/26 Bundesliga. Jamie Leweling opened the scoring early, with Maximilian Mittelstädt making it 2-0 from a penalty before Leweling again and Deniz Undav increased the lead to 4-0 just before half-time. Alejandro Grimaldo's penalty reduced the deficit midway through the second period.
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Bayer 04 Leverkusen has gained a new partner in digital gaming platform Crown Coins, which joins the Bundesliga runners-up's Sponsors Club with immediate effect. The one-and-a-half-year contract runs until 30 June 2027.
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