
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 FIFA World Cup 2026 in the USA, Canada and Mexico is underway. A total of eight Leverkusen players are taking part in the 23rd World Cup, with 48 teams in the tournament for the first time. Bayer04.de brings you all the latest from Werkself players at the World Cup.
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A goal-fest to kick off the U19 European Championship in Wales: Germany defeated Denmark 4–3 in their first Group A fixture. Both Montrell Culbreath and captain Francis Onyeka were in the starting line-up, with the latter scoring the first goal of the game from the penalty spot on five minutes.
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Bayer 04 have transferred U19 midfielder Emmanuel Chigozie Owen to FC Utrecht in the Eredivisie.
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Renovation work has been underway at the BayArena for several weeks now as part of the stadium’s routine refurbishment after 17 years. More and more of the new folding seats – which, from next season, will provide significantly greater comfort and make it easier to move between rows – have now been installed. The new high-quality seats have now been fitted throughout the entire east stand, giving the BayArena a new lease of life.
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