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.”
It was a disappointing Saturday night. The Werkself lost 4-1 to VfB Stuttgart to start the new year on Bundesliga matchday 16 in 2025/26, a result that left both players and fans disappointed. "We played without any passion," said Alejandro Grimaldo honestly afterwards. Teammate Jarell Quansah was even more self-critical, emphasising: "We were miles off it in the first half. You can't put in a performance like that, especially in front of our own fans and I can only apologise to them, to be honest." Read on for the reaction, facts and stats from the clash with VfB Stuttgart in the Werkself review.
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Women’s team forward Paulina Bartz is leaving Bayer 04 Leverkusen to play for Hamburg SV until the end of the season. The 20-year-old, whose contract runs to 2027, joins the Bundesliga newcomers on loan until the summer.
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Jarell Quansah and Alejandro Grimaldo speak to Werkself-TV following Bayer 04's 4-1 defeat to VfB Stuttgart on Bundesliga Matchday 16...
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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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