Kristoffer Ajer

Ajer's current-season form is level with last season (Season 26→26), while his Rating held around 58. His peak season for form remains 2020/21 (Season 60).

Domestic career

Season	Club	Apps	G	A	Match	RTG	Season
2026/27	Brentford · 4th	1	0	0	7.3	58	26
2025/26	Brentford · 9th	27	0	1	6.66	58	26
2024/25	Brentford · 10th	26	0	0	6.66	68	14
2023/24	Brentford · 16th	29	2	1	6.86	75	23
2022/23	Brentford · 9th	9	0	0	6.44	72	13

Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year. 8 earlier seasons and 2 youth-team spells in the full career.

Norway · international

Side	Apps	G
Norway	59	3
Norway U21	5	1
Norway U19	6	3
Norway U17	2	1

Career caps & goals — tournament breakdown in the full career.

Scout report

Squad depthCentral defender

K. Ajer is a 28-year-old central defender at Brentford, rated 58.3 overall by Field Insider's model. An experienced operator, he has been a rotation option this season (53.2% of available minutes). His defensive output reads 3.51 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Ajer.

On the season, Ajer graded 26 for current form (age-blind), on 5 clean sheets and 3.511 defensive actions per 90.

Year-on-year, that's broadly in line with last season (Season 26 → 26). Over the 7 seasons on record his form has drifted down, peaking in 2020/21.

On long-term talent our Rating reads 58. At 28 Ajer is in his prime years, and a market index of 42 reflects that trajectory.

From the career report

Read the full career report →

Below his 2020/21 peak but holding a solid level — the platform for a return is there.

Peak: 2020/21Holding level

58.3

Ratingi

a strong, regular top-tier starter

25.9

Seasoni

below regular-starter level

53.2%

Minutes

rotation minutes

3.51

Def. actions / 90

solid defensive volume

Output in context · Brentford finished 9th of 20 · a mid-table side

Apps

3.51

Def. / 90

Tackles

Interceptions

Clean sheets

3.51 tackles, blocks & interceptions per 90 — solid defensive volume, with 5 clean sheets across 27 appearances. Going forward he chipped in 0 goals and 1 assist — a useful bonus from the back.

Strengths

Defensive volume. 3.51 tackles, blocks & interceptions per 90 — does the unseen work.
Pedigree. Performing in a top-tier setting (team strength 95.8/100).

Watch points

Game time. Only 53.2% of available minutes — needs a settled run to prove the level.

Outlook

Rated 58.3 overall — a strong, regular top-tier starter. Defensively he reads as solid defensive volume (3.51 tackles, blocks & interceptions per 90). Experienced and reliable, but the value curve is easing (1.2× now → 0.9× projected in three years).

Generated from Field Insider's rating model · AI-written analysis to follow.

Per 90 & availability

Minutes played %53.2%

Available fixtures38 of 38

Goals / 900

Assists / 900.049

Goal contribution / 900.049

Defensive actions / 903.511

Player flow

Goal involvements1

Cards / 900.198

Season-by-season progression

Rating (potential)Season (form)

Value & potential by age

Market valueRating

Solid = now · dashed = projected

The gold line is market value — an index (not €) blending rating, age and league. It climbs through the early 20s, peaks around ages 23–27 (~70), then tapers with age. At 28, Ajer sits on 42, past its peak and easing. The blue line is Ajer's projected Rating — 58.3 today — recomputed at each age, so it follows the same rise-and-fall as a career matures and declines. Solid = up to today; dashed = projected.

Season statistics

Bars = where he ranks among centre-backs in the Premier League with 600+ minutes this season.

Shooting

Goals0

Passing

Assists1

Defending

Tackles37

Interceptions18

Blocks16

Yellow/red cards

Yellow cards4

Red cards0

Transfer history

€16.3M total transfer fees · 3 moves

BrentfordJul 2021 – now€ 15.7M

CelticJul 2017 – Jul 2021

Kilmarnockuntil Jul 2017

CelticJul 2016 – Jul 2017€ 600K

Startuntil Jul 2016

About K. Ajer

Kristoffer Vassbakk Ajer is a 28-year-old centre-back who plays for Brentford, born on April 17, 1998 in Rælingen, standing 198 cm tall. He is from Norway. Brentford currently sit 4th of 20 in the Premier League.

This season

In the current season, K. Ajer has made 1 appearances with 0 goals and 0 assists across 90 minutes, averaging a 7.3 match rating over his last 1 rated games.

Recent matches

August 22, 2026: 3-0 win at home vs Tottenham (90 minutes, 7.3 rating)

K. Ajer's next match is on August 30, 2026, when Brentford face Leeds away in the Premier League.

Field Insider's view

Field Insider currently rates K. Ajer at 58.3 with a Season form score of 25.9. See the full scout report for strengths, watch-points and the market-value outlook.

His honours include 15 career titles — among them the Premier League Cup and the Premiership. Full list in the career record.

Career

Across 13 recorded seasons, K. Ajer has totalled 310 club appearances with 17 goals and 10 assists for 6 different clubs. His busiest campaign came in 2020/21, with 35 appearances for Celtic.

K. Ajer's career has also included time at Celtic, Kilmarnock and Start.

On the international stage, K. Ajer has represented Norway, Norway U21, Norway U19, Norway U17 — 72 caps and 8 goals in our records.

Transfer news

No transfer news found for this player.