
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 have extended midfielder Noah Mbamba’s contract by twelve months and sent the Belgian U21 international on loan to France. At FC Lorient, the 21-year-old – whose contract at Leverkusen now runs to 30 June 2029 – is set to gain playing time in Ligue 1 and, through strong performances and further development, put himself in the running for a future place in the Werkself squad.
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Spurred on by a flawless hat-trick from Cornelia Kramer, the Bayer 04 women’s team won their penultimate pre-season friendly in commanding fashion. As part of the season launch, the Werkself beat Dutch top-flight side Feyenoord 7–0. In front of 3,000 spectators at the Ulrich Haberland Stadium, Kramer (6’, 25’, 45’), Sofie Zdebel (47’), Maja Sternad (59'), Natasha Kowalski (83') and Vanessa Fudalla (86') scored the goals for coach Roberto Pätzold’s side.
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There’s plenty for Bayer 04 fans to enjoy both on and off the pitch at the official 2026 season launch. In addition to the women’s team taking on Feyenoord at the Ulrich Haberland Stadium at 13:15 CEST and the men’s team facing Sevilla at the BayArena at 15:30 CEST, fans of all ages can enjoy a range of activities – and get to meet Bayer 04 players and former players in the process. The Fanwelt is also offering a special promotion: buy a new shirt and get free printing! Here’s an overview of everything you need to know about the season launch, including the live streams.
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A round-up of the Werkself training camp in the Weimarer Land, all in one place: in our daily blog you’ll find all the insights and updates from the day. Day six (Friday 7 August) is as follows: This morning, the squad completed their final training session – this time behind closed doors – here in Blankenhain, before heading back to Leverkusen after lunch. The big season launch is scheduled for tomorrow.
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