| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2020 | Eliteserien | 2 | 6 | 0 | 0 | — | 6.63 |
| 2021 | Eliteserien | 10 | 247 | 0 | 0 | 0 | 6.62 |
| 2021 | 2. Division: Group 2 | 12 | 868 | 0 | 0 | 0 | — |
| 2022 | Eliteserien | 25 | 1471 | 2 | 0 | 0.12 | 6.83 |
| 2023 | 1. Division | 27 | 1833 | 0 | 1 | 0.05 | 7.23 |
| 2024 | Eliteserien | 4 | 360 | 0 | 1 | 0.25 | 7.19 |
| 2025 | Eliteserien | 9 | 250 | 0 | 0 | 0 | 6.34 |
| 2026 | Eliteserien | 6 | 225 | 0 | 0 | 0 | 6.41 |
Domestic league competitions only (SportMonks sub_type='domestic'); national-team, continental and cup competitions are excluded. Classification resolved by league id against the canonical leagues index. G+A/90 computed from minutes actually played.
Figures computed from the GioScore season-stats database · as of 2026-08-12
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Vålerenga | 7 | 4 | 2 | 1 | 0 | 0 | 0 | 0 |
 Sarpsborg 08 | 7 | 2 | 3 | 2 | 0 | 0 | 0 | 0 |
 Sandefjord | 6 | 2 | 1 | 3 | 0 | 0 | 0 | 0 |
 Rosenborg | 6 | 2 | 3 | 1 | 0 | 0 | 1 | 0 |
 Lillestrøm | 6 | 2 | 2 | 2 | 1 | 0 | 2 | 0 |
 Tromsø | 6 | 1 | 2 | 3 | 0 | 0 | 0 | 0 |
 Strømsgodset | 5 | 4 | 0 | 1 | 0 | 0 | 0 | 0 |
 Bodø / Glimt | 5 | 0 | 1 | 4 | 0 | 0 | 0 | 0 |
 Haugesund | 4 | 1 | 0 | 3 | 0 | 0 | 0 | 0 |
 Molde | 4 | 0 | 1 | 3 | 0 | 0 | 1 | 0 |
 Odd | 4 | 2 | 2 | 0 | 0 | 0 | 0 | 0 |
 Viking | 3 | 0 | 0 | 3 | 0 | 0 | 0 | 0 |
 Aalesund | 3 | 2 | 0 | 1 | 1 | 0 | 0 | 0 |
 Stabæk | 3 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
 Mjøndalen | 3 | 0 | 2 | 1 | 0 | 0 | 0 | 0 |
 Jerv | 3 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
 Brann | 3 | 0 | 2 | 1 | 0 | 0 | 0 | 0 |
 Moss | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
 Start | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
 Kongsvinger | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
Player stats against each opponent national team
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Scotland U21 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
M. Williamsen went through 6 Eliteserien appearances in 2026 (225 minutes) without a goal or an assist. That season graded out at an average match rating of 6.41.
No season rated higher than 2023 (7.23, 1. Division); none lower than 2025 (6.34). Compared with his earlier career average, the last two rated seasons are down by 0.52.
