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Introduction
Liverpool and Brentford have struck a significant agreement that could reshape both clubs’ goalkeeper situations. Brentford have agreed an initial £12.5 million deal with Liverpool to sign Republic of Ireland international Caoimhin Kelleher, with performance-related add-ons potentially taking the fee up to £18 million. This move comes as part of a chain of transactions, as the Bees are also set to sell Mark Flekken to Bayer Leverkusen in a separate agreement worth £11 million.
Caoimhin Kelleher: A Long-Term Target for Brentford
Brentford’s interest in Kelleher didn’t emerge overnight. In fact, the club had been tracking him well before they signed Mark Flekken. Kelleher has long been viewed as a highly-rated backup at Liverpool, someone capable of stepping up into a regular starting role. His composure, shot-stopping ability, and experience at both club and international level have made him an attractive option for clubs seeking a reliable goalkeeper.

Now 26, Kelleher has been in search of more first-team opportunities, which have been hard to come by at Anfield. The recent developments suggest that Brentford see him as a key part of their future between the posts.
Medical Scheduled for Monday
The move looks set to become official very soon. Kelleher is expected to undergo a medical with Brentford on Monday, which would complete the first major goalkeeper transfer of the summer for the Bees. Once everything is signed and sealed, Brentford will have a new No.1 or at least a new candidate to push for that role.
Competition from West Ham and Leeds
Brentford weren’t the only club keen on the Irishman. West Ham and Leeds United were also reportedly interested in signing Kelleher. However, Brentford managed to win the race, thanks in part to their ongoing relationship with Liverpool.
That connection has helped smooth over negotiations, especially after Brentford previously secured both Sepp van den Berg and Fabio Carvalho on loan from Liverpool during last summer’s transfer window. That positive history likely gave them an edge in what was a competitive pursuit.
Liverpool Finally Open to Selling Kelleher
One of the key factors in this transfer finally moving forward was Liverpool’s change of stance. While Kelleher had long been admired by other clubs, the Reds had been reluctant to sell. That changed once Liverpool secured the services of Giorgi Mamardashvili from Valencia last summer.

With the highly-rated Georgian now set to challenge Alisson Becker for minutes at Anfield, Liverpool were finally open to letting Kelleher leave. The timing aligns well with Brentford’s needs and ambitions.
Performance-Related Add-Ons Take Deal to £18 Million
The agreed deal is worth £12.5 million initially, but performance-related add-ons could see the final fee rise to £18 million. While the exact details of the add-ons have not been disclosed, they’re likely to be tied to appearances, clean sheets, and potentially international performances with the Republic of Ireland.
This kind of deal structure is not unusual, especially when a club like Liverpool wants to ensure they receive fair value for a player who has yet to hit his full potential but clearly has the tools to succeed.
Brentford Set to Sell Mark Flekken to Bayer Leverkusen
As Kelleher prepares to arrive at Brentford, Mark Flekken is preparing to depart. The Dutch international is expected to complete a move to Bayer Leverkusen, with a fee in the region of £11 million already agreed between the two clubs.
The timing is significant. Brentford wanted to ensure they had a replacement lined up before allowing Flekken to leave, and Kelleher fits that requirement perfectly. Once Kelleher’s deal is finalized, Flekken will be free to complete his switch to the Bundesliga.
Changing of the Guard at Brentford
Brentford’s goalkeeping department is undergoing a major transformation. Flekken, who was signed to be the club’s first-choice keeper, is now set to leave after just one season. That opens the door for Kelleher to step in and stake his claim.
The club’s decision to move quickly and decisively shows a high level of trust in Kelleher’s ability to become a consistent performer at Premier League level. Given his track record with Liverpool when called upon, it’s a gamble that could pay off.
Liverpool’s Goalkeeping Picture Going Forward
For Liverpool, this move is both practical and strategic. With Giorgi Mamardashvili brought in from Valencia last summer, the goalkeeping department is in good shape. Alisson remains the clear No.1, but Mamardashvili offers a high-quality backup and possibly a long-term successor.

Selling Kelleher at this stage makes sense. At 26, he needs regular football to develop further, and Liverpool now have cover in place to allow him to move on.
A Win-Win Deal for All Parties
When you look at the broader picture, this is one of those rare deals that seems to work for everyone involved:
- Brentford get a goalkeeper they’ve admired for years, someone still young enough to grow with the club.
- Liverpool secure a solid fee for a backup player, while also giving Kelleher the opportunity he’s earned.
- Kelleher gets the chance to be a first-choice Premier League keeper at a club that genuinely wants him.
- Mark Flekken gets a fresh start in Germany with Bayer Leverkusen, a top club competing in Europe.
What Happens Next
All eyes will be on Monday, when Kelleher is set to undergo his medical with Brentford. Assuming there are no unexpected hitches, he’ll officially become a Brentford player shortly after.
Then, the domino effect will take full shape: Mark Flekken will be free to complete his £11 million move to Bayer Leverkusen, wrapping up one of the summer’s most coordinated transfer sequences.
It’s a smart bit of business from Brentford, who have managed to turn over their goalkeeper position in a swift and well-managed manner, while Liverpool continue to reshape their squad with calculated decisions.
Conclusion
Transfers like this don’t happen in isolation. They’re the product of months sometimes years of scouting, negotiation, and timing. Brentford had their eye on Kelleher even before Flekken arrived, and they finally got their man now that Liverpool are ready to part ways.
With the medical set and terms agreed, it’s now just a matter of time before Kelleher pulls on a Brentford shirt for the first time. And once he does, he’ll be looking to prove that he’s not just a great backup but a legitimate No.1 in the Premier League.
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YNWA (You’ll Never Walk Alone)!
The Liverpool FC Times Team
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