J. Karlsson

Following his move to Aberdeen, Karlsson's current-season form is up 333% on last season (Season 9→39), while his Rating eased 60→36. His peak season for form remains 2021/22 (Season 73).

Domestic career

Season	Club	Apps	G	A	Match	RTG	Season
2025/26	UtrechtLoan · 6th	18	4	1	6.89	45	16
2025/26	AberdeenLoan · 8th	18	5	0	6.85	31	20
2024/25	LecceLoan	17	1	0	6.49	—	—
2024/25	Bologna · 9th	24	2	0	6.49	60	9
2023/24	Bologna · 5th	7	0	0	6.87	63	0
2023/24	AZ Alkmaar	1	0	0	6.7	—	—
2022/23	AZ Alkmaar · 4th	23	9	4	7.23	71	42
2021/22	AZ Alkmaar · 5th	38	17	12	7.37	80	73

Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year. 6 earlier seasons in the full career.

Sweden · international

Side	Apps	G
Sweden	12	5
Sweden U21	5	6
Sweden U19	6	2

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

Scout report

Project playerCentral midfielder

J. Karlsson is a 28-year-old central midfielder at Servette FC, enjoying a standout season — 5 goals and 0 assists in 18 appearances, a Season grade of 39, top 24% of Super League central midfielders. On long-term scout potential he's rated 36.4, ranking 113th of 200 in the Super League. An experienced operator, he has been a regular starter (75.5% of available minutes). His defensive output reads 1.12 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Karlsson.

Judged on this season alone, Karlsson graded 39 — a strong campaign that ranks top 24% of the 17 central midfielders in the Super League, on 5 goals, 0 assists and 1.115 defensive actions per 90.

Year-on-year, that's a clear step up on last season (Season 9 → 39). Over the 6 seasons on record his form has drifted down, peaking in 2021/22.

On long-term talent our Rating reads 36, 8th of 17 of the 17 central midfielders in the Super League. At 28 Karlsson is in his prime years, and a market index of 7.1 reflects that trajectory.

From the career report

Read the full career report →

Past his 2021/22 peak — the recent trend is downward, so buyers are paying for what's left, not what was.

Peak: 2021/22Trending downStreaky

Current potential8th of 17 central midfielders · Super League Current seasonTop 24% central midfielders · Super League 4th-best central midfielder in the Super League 113th in the Super League · potential 8th-highest potential central midfielder in the Super League

36.4

Ratingi

8th of 17 central midfielders

39.3

Seasoni

developing / rotation level

75.5%

Minutes

a regular starter

1.12

Def. actions / 90

light defensive volume

Output in context · Servette FC finished 8th of 12 · a mid-table side

Apps

1.12

Def. / 90

Tackles

Interceptions

Clean sheets

1.12 tackles, blocks & interceptions per 90 — light defensive volume, with 4 clean sheets across 18 appearances. Going forward he chipped in 5 goals and 0 assists — a useful bonus from the back.

Strengths

Availability. On the pitch for 75.5% of available minutes — a dependable presence in the XI.
Attacking threat. Chips in from deep: 0.35 goal involvements per 90, useful for a central midfielder.

Watch points

Defensive numbers. Modest 1.12 defensive actions per 90 for the position.
Level. Rates below a nailed-on top-tier starter on our model.

Outlook

With a Rating of 36.4, Karlsson carries the 8th-highest potential of the central midfielders in the Super League of 17. Defensively he reads as light defensive volume (1.12 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 %75.5%

Available fixtures18 of 38

Goals / 900.349

Assists / 900

Goal contribution / 900.349

Defensive actions / 901.115

Player flow

Goal involvements5

Shot conversion %31.3

Shot accuracy %51.6

Pass accuracy %79

Dribble success %61.5

Cards / 900.139

Foul involvement / 902.51

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 (~12), then tapers with age. At 28, Karlsson sits on 7.1, past its peak and easing. The blue line is Karlsson's projected Rating — 36.4 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 central midfielders in the Super League with 600+ minutes this season.

Shooting

Goals5

Shots on target16

Shots31

Penalties scored2—

Passing

Assists0

Chances created30—

Passes430—

Pass accuracy79%

Possession

Successful dribbles24

Dribble success61.5%

Duels won51—

Duels won %42.1%—

Fouls won16

Defending

Tackles8

Interceptions7

Blocks1

Fouls committed20

Yellow/red cards

Yellow cards2

Red cards0

Transfer history

€13.6M total transfer fees · 10 moves

Servette FC(on loan)Sept 2026 – now

Bologna(back from loan)Jun 2026 – Sept 2026

Utrecht(on loan)Jan 2026 – Jun 2026

Bologna(back from loan)Jan 2026 – Jan 2026

Aberdeen(on loan)Sept 2025 – Jan 2026

Bologna(back from loan)Jul 2025 – Sept 2025

Lecce(on loan)Jan 2025 – Jul 2025

BolognaAug 2023 – Jan 2025€ 11M

AZ AlkmaarOct 2020 – Aug 2023€ 2.6M

IF ElfsborgJan 2017 – Oct 2020

Falkenbergs FFuntil Jan 2017

About J. Karlsson

Karl Jesper Karlsson is a 28-year-old central midfielder who plays for Servette FC, born on July 25, 1998, standing 171 cm tall. He is from Sweden. Servette FC currently sit 8th of 12 in the Super League.

This season

In the current season, J. Karlsson has made 18 appearances with 5 goals and 0 assists across 1,291 minutes, averaging a 6.87 match rating over his last 9 rated games, with 2 yellow cards. His season has spanned the Premiership, the Eredivisie and the UEFA Europa Conference League. Though primarily a central midfielder, he has also lined up in attack this season.

When J. Karlsson plays, Servette FC's record this season is 16W-10D-16L — and his match ratings average 7.07 at home against 6.62 on the road.

Recent matches

May 24, 2026: 0-0 draw away at Ajax (70 minutes, 6.3 rating)
May 21, 2026: 3-2 win at home vs Heerenveen (80 minutes, 6.5 rating)
May 17, 2026: 2-0 win at home vs Fortuna Sittard (64 minutes, 7.2 rating)
May 10, 2026: 2-1 win away at Ajax (66 minutes, 6 rating)
May 2, 2026: 2-0 win at home vs NAC Breda (45 minutes, 1 assist, 7.7 rating)
April 26, 2026: 0-5 loss away at Excelsior (10 minutes, 6.3 rating)
April 11, 2026: 4-1 win at home vs Telstar (14 minutes, 1 goal, 7.9 rating)
April 4, 2026: 3-4 loss away at PSV Eindhoven (31 minutes, 1 goal, 7.2 rating)
March 22, 2026: 2-0 win at home vs GO Ahead Eagles (2 minutes)
March 15, 2026: 2-0 win away at Twente (21 minutes, 6.7 rating)

Field Insider's view

Field Insider currently rates J. Karlsson at 36.4 with a Season form score of 39.3, ranking 113th of 200 central midfielders in the Super League. See the full scout report for strengths, watch-points and the market-value outlook.

Career

Across 11 recorded seasons, J. Karlsson has totalled 291 club appearances with 75 goals and 35 assists for 7 different clubs. His busiest campaign came in 2021/22, with 38 appearances for AZ Alkmaar.

J. Karlsson's career has also included time at Bologna, Utrecht, Aberdeen, Lecce, AZ Alkmaar, IF Elfsborg and Falkenbergs FF.

On the international stage, J. Karlsson has represented Sweden, Sweden U21, Sweden U19 — 23 caps and 13 goals in our records.

Transfer news

No transfer news found for this player.

Profile

Season stats

Also this season

Performance data · by competition

Career

Scout report

Output in context · Servette FC finished 8th of 12 · a mid-table side

Strengths

Watch points