
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.”

Bayer 04 Leverkusen welcomes a new official member to the Sponsors’ Club at the start of the 2026/27 campaign. KKV Kabelverlegung GmbH & Co. KG is expanding its existing partnership and will, with immediate effect, act as a supporter of the Bundesliga club at the second-highest partner level, just below the premium tier. As an official partner in the Sponsors’ Club, KKV will now enjoy significantly enhanced visibility during Werkself matches at the BayArena. The new contract is initially valid until 30 June 2028.
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Bayer 04 Leverkusen has extended the existing partnership agreement with EDO Personalservice GmbH and, at the same time, expanded its collaboration with the Cologne-based company. The official partner in the Business Club has been upgraded within Bayer 04’s partner network. The revised and enhanced support for the club has initially been agreed for two years, running until 30 June 2028.
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Video games developer Electronic Arts (EA), in collaboration with the Bundesliga, has announced the six nominees for the Bundesliga ‘Player of the Month’ award for September – Bayer 04’s Miguel Gutiérrez has made it into this select group after just four Bundesliga matches. Fans of the Black and Reds can vote from now until Sunday 27 September (23:59 CEST).
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Calling all Werkself fans: Even during the three-week international break – a first for September and October – you have the chance to visit the BayArena – and for a very special occasion. Bayer 04 is hosting a Health Day on Saturday 3 October, from 10:00 to 14:00 CEST in the Premium Lounge. Together with Bayer Vital and main sponsor BarmeniaGothaer, the Bundesliga club invites you to an interactive, free event centred on the theme of health. Partners will be present on site with their own exciting activities. Here is an overview of the programme of events.
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