Kristoffer Vassbakk Ajer
Kristoffer Vassbakk Ajer is a Norwegian centre-back for Brentford. Born in Rælingen in 1998, he began at Rælingen FK before joining Lillestrøm SK at 11. After moving with his family to Kristiansand, Ajer joined IK Start and made his professional debut as a teenager. In 2015, he captained Start against Lillestrøm and became the youngest captain in Norway’s top flight. Celtic signed Ajer in 2016, and, following a loan spell at Kilmarnock, the club converted him from central midfield into defence. He became an important Celtic player, helping the Glasgow side win three successive Scottish league titles and contributing to a Treble Treble-winning team. Ajer moved to Brentford in 2021 and has also represented Norway, while his height and ability to play across the back line have supported his role as a versatile defender.
Season snapshot
Overall season statistics (all competitions).
| Season | Matches | Minutes | Goals | Assists | G/90 | A/90 |
|---|---|---|---|---|---|---|
| 2026 | 23 | 1977 | 2 | 0 | 0.09 | 0 |
| 2025 | 28 | 1975 | 0 | 2 | 0 | 0.09 |
| 2024 | 39 | 2801 | 1 | 0 | 0.03 | 0 |
| 2023 | 32 | 2141 | 3 | 1 | 0.13 | 0.04 |
| 2022 | 11 | 878 | 0 | 0 | 0 | 0 |
| 2021 | 27 | 2212 | 1 | 3 | 0.04 | 0.12 |
| 2020 | 58 | 5106 | 2 | 4 | 0.04 | 0.07 |
| 2019 | 8 | 675 | 0 | 0 | 0 | 0 |
| 2018 | 3 | 160 | 0 | 0 | 0 | 0 |
| 2017 | 1 | 90 | 0 | 0 | 0 | 0 |
| 2016 | 11 | 934 | 0 | 1 | 0 | 0.1 |
| 2015 | 32 | 2761 | 9 | 0 | 0.29 | 0 |
Form - Last 10 games
Strengths Analysis Season 2025
Role: DefenderTop attributes (percentile)
Xtra rating history
Last rating points (most recent matches).
Recent Matches
League Cup - Stadium of Light, Sunderland, England
Premier League - The MKM Stadium, Hull, England
UEFA Nations League - Estádio Do Dragão, Porto, Portugal
Teams
Transfers
Celtic
Brentford
Kilmarnock
Celtic
Start
Celtic
Honors
