
The 22-year-old Colombia international spent last season on loan at Hull City in the English Championship. The English club exercised the agreed purchase option in April and signed him permanently until 2028. However, due to a transfer ban that has since been imposed, Hull City cannot register Puerta, which is why the midfielder returned to Leverkusen.
Puerta was signed by Bayer 04 from Bogota FC in January 2023 and initially loaned to Nürnberg in Bundesliga 2. He made a total of 10 appearances for the Werkself in the Bundesliga and the UEFA Europa League in the 2023/24 season.

Bayer 04 Leverkusen have agreed a loan deal with Bundesliga club Borussia Mönchengladbach for Argentinian striker Alejo Sarco. The 20-year-old joins Mönchengladbach with immediate effect for the rest of the season.
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The Werkself are away to Greek double winners Olympiacos on matchday 7 in the league phase of the 2025/26 UEFA Champions League campaign. Tonight, 20 January (kick-off: 22:00 local time/21:00 CET), Bayer 04 will not only face a familiar face in Panagiotis Retsos, but also an experienced and successful team in their Greek top-flight opponents. The Olympiacos midfield and forward line in particular are peppered with seasoned veterans from top European clubs - but even they will first have to find solutions against the Werkself defence that has recently performed with aplomb in the UCL. The matchday news.
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The Werkself are away to Greek double winners Olympiacos on matchday 7 of the 2025/26 UEFA Champions League league phase. Ahead of the clash on Tuesday, 20 January (kick-off: 21:00 CET), head coach Kasper Hjulmand spoke about anticipation for the game. Werkself player Ibrahim Maza also gave an insight into dealing with the recent setbacks.
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After their first win on matchday 6 in the UCL league phase, Olympiacos are still in with a good chance of reaching the play-offs in the UEFA Champions League. The 2024 UEFA Conference League winners will be looking to go one better in their home match against Bayer 04 this Tuesday, 20 January (kick-off: 21:00 CET), but their stop scorer is unavailable. The lowdown on our next opponents.
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Panagiotis, known as Panos, Retsos wore the Bayer 04 jersey for three years. Including his loan spells, he was under contract with the Werkself for a total of four and a half years. "It's a very special club for me," said the 27-year-old, who returned to his boyhood club Olympiacos in 2022, in an interview with bayer04.de. The former Leverkusen man is now captain and a first choice for the Werkself's next opponents in the UEFA Champions League. Ahead of the clash on Tuesday night, 20 January (kick-off: 21:00 CET), Retsos talks about his fond memories of his time in Leverkusen and the imminent reunion with some of his former team-mates. He also talks about who brought him to Leverkusen and why he likes getting older.
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