Arsenal Women have fired a monumental warning shot to the rest of European football. On Tuesday, July 14, 2026, the Gunners officially completed the signing of 19-year-old German youth international sensation Lisa Baum from Bundesliga side RB Leipzig.
In what is turning out to be an absolute dream of a summer transfer window, Arsenal didn't just sign a highly-rated teenager—they beat out fierce competition from Barcelona, Bayern Munich, Lyon, and Manchester United to secure her signature.
Here is the upgraded, definitive guide to Arsenal's brand-new number 19, her unique tactical profile, and why this transfer has put the rest of the Women's Super League on high alert.
Player Profile: Lisa Baum at a Glance
| Attribute | Details & Milestones |
| Age | 19 years old |
| Position | Left-footed Wide Forward / Right Winger |
| Squad Number | No. 19 (Vacated by Caitlin Foord) |
| Former Clubs | Hamburger SV (2021–2025), RB Leipzig (2025–2026) |
| 2025/26 Stats | 26 appearances, 6 goals (Frauen-Bundesliga) |
| Contract Length | 3-year deal with an option for an additional year |
The Tactical Fit: Direct Intent & Inverted Magic
Lisa Baum is the prototype for the modern elite winger. Although she is naturally left-footed, she primarily operates on the right wing, giving Arsenal an incredibly dangerous inverted threat. Known for her blistering pace, one-on-one dribbling capability, and a lethal shot from distance, she brings a dynamic directness that Slegers' attack has been craving.
The teenager's arrival is also a masterstroke in succession planning. She joins a star-studded wide group alongside Olivia Smith, Chloe Kelly, and Caitlin Foord, allowing Arsenal to comfortably rotate across the WSL, FA Cup, and UEFA Women's Champions League campaigns.
Head coach Renée Slegers couldn't hide her excitement about the signing:
"Lisa is a young wide forward who will bring direct intent and athleticism to our attacking group. At 19, she is still developing and we believe she has huge potential, which we will support her to achieve. We welcome her to Arsenal and look forward to the road ahead together."
Why the Hype is Entirely Real
To understand why Europe's elite were in a mad scramble for her signature, you only have to look at her rapid upward trajectory. Just four years ago, Baum was starting her journey in the German lower tiers with Hamburger SV. She helped Hamburg achieve back-to-back promotions to rise from the third division into the Bundesliga.
After sealing a move to RB Leipzig in 2025, she immediately adapted to top-flight football, registering 6 goals in 26 appearances during a stellar breakthrough campaign in the 2025/26 season.
"I'm so happy to join Arsenal and I can't wait to get started," Baum said. "This league is so competitive and Arsenal is a big club, so I'm excited to challenge myself and compete with the best. I want to win trophies and develop my game, and Arsenal feels like the perfect match to achieve that."
Slegers is Building a Superteam
If the rest of the WSL wasn't paying attention before, they certainly are now. By securing Baum, Arsenal's Director of Women's Football Clare Wheatley and head coach Slegers have put together a transfer window for the history books. Baum is the latest in a summer recruitment drive that has already seen global superstars Georgia Stanway, Ona Batlle, Geraldine Reuteler, and Selina Cerci walk through the doors at London Colney.
The average age of the squad is dropping, the tactical flexibility is rising, and the message is crystal clear: Arsenal is building a team to conquer both England and Europe.
Do you think Lisa Baum is the signing of the summer for the Gunners, and will she fire them to the WSL title?
