Kristoffer Ajer, a resolute Norwegian defender, was born on 17 April 1998, which attributes his age as of current to 27 years. He is presently known for serving Brentford with his stellar defending skills, primarily leading as a central defender. Notably tall and robust, Ajer stands at 6ft 5in (1.96m) and weighs 13st 3lb (84kg). He brings the Brentford squad to life by donning the No. 20 jersey, though his reputation on the pitch precedes him in the Norway national team as well.
The chap has a current market value around the region of £13.5m, as per Transfermarkt. His footballing journey saw its initial dawn in January 2014 when he joined Start in the Norwegian Eliteserien as a trainee, showcasing considerable talent with 13 first team appearances and one goal during his debut season. His progress remained consistent into the 2015 season, racking up 28 appearances and eight goals. 2016, however, saw a dip in appearances; he managed to play in only 11 league matches, yet his contribution was nevertheless significant.
Ajer's voyage then led him to the Scottish Premiership club, Celtic, for a fee around £750k in July 2016. A noble tenure that encompassed fruitful seasons, he proved an indispensable asset for Celtic. The 2017-2018 season witnessed his involvement in 24 league matches, with a subsequent increase to 28 matches for the following two seasons. With his increased presence on the pitch, he seized the opportunity to climb the goal tally, netting three goals in the 2019-2020 season and two in the season after.
In January 2017, an interim period saw Ajer loaned to Kilmarnock, another Scottish Premiership club. Despite the short stint, he managed to make 16 appearances. The fruition of his loan proceeded his return to Celtic in July 2017, and his consistent performances remained a pivotal part of Celtic's line-up in subsequent years.
From the Celtic grounds, Ajer found his way into Brentford's ranks in the Premier League in England in July 2021, for which a hefty approximate of £14m was paid. Proving worthy of his price, he featured heavily in Brentford's campaigns, making over 20 appearances each season, and even managing to dribble the ball into the back of the net a handful of times. His current 2025-2026 season, so far, also nails a respectable 22 league appearances.
Ajer's influence is not solely confined to his club performances, as his feats stretch to the international scene. Throughout the 2025-2026 League Cup and the 2024-2026 World Cup qualifiers for Norway, Ajer has punctuated his appearances with consistency and a goal to his name.
