
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 final whistle of the current 2025/26 season marks the end of a unique partnership for Bayer 04 Leverkusen. After more than three decades of collaboration and highly eventful times, the Bundesliga football club and the private brewery Bitburger are going their separate ways.
Show more
Around four months after their bitter exit in the DFB Pokal Round of 16, the Bayer 04 Women are once again away to Hamburger SV. On Monday night (18:00 CEST), the Werkself will not only be looking to pick up important points in the final phase of the Google Pixel Women's Bundesliga at the Volksparkstadion, but also to make amends for their defeat on penalties.
Show more
A simple approach to sport with games, fun and a highlight at the end: Bayer 04 organised a very special training session for 40 participants aged between six and 27 in cooperation with the Football Association of the Middle Rhine (FVM). At the day of action for women and girls with disabilities at the Kurtekotten Performance Centre, many of the participants gained their first experience of football.
Show more
On Saturday, 28 March, the lights will go out again at the BayArena from 20:30 pm to 21:30. As in previous years, Bayer 04 once again take part in the WWF Earth Hour campaign under the motto "We're switching off" as the club wants to set a collective example for more climate and environmental protection together with people, cities and companies around the world.
Show more