
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.”

Ahead of the conclusion to the 2025/26 season with the Werkself and the World Cup with Argentina, Bayer 04 midfielder Exequiel Palacios answered questions from journalists from the Latin America region. In a digital media round, the 27-year-old, who's been in Leverkusen since 2020, spoke about the "great development potential" in the current Werkself squad as well as his World Cup ambitions with the Albiceleste, among other things.
Show more
Full-back Julia Mickenhagen is leaving Bayer 04 Leverkusen at the end of the season to join Bundesliga newcomers VfB Stuttgart. The 21-year-old’s contract with the club expires on 30 June.
Show more
Werkself-TV shows the highlights of the Bayer 04 women's 3-1 win at RB Leipzig on the 25th matchday of the Google Pixel Frauen-Bundesliga 2025/26.
Show more
Bayer 04 Women still have a chance of qualifying for the UEFA Women’s Champions League for the first time ever going into the final day of the season after a 3-1 win at RB Leipzig on Monday evening. The result took Roberto Pätzold’s side to within two points of Eintracht Frankfurt in third place. Cornelia Kramer, Katharina Piljic and Ruby Grant scored the goals for the Werkself’s fifth consecutive win that sets up a thrilling final matchday at home to Werder Bremen on Sunday.
Show more