| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2014 | Eliteserien | 1 | 46 | 0 | 0 | — | — |
| 2015 | Eliteserien | 1 | 1 | 0 | 0 | — | — |
| 2016 | Eliteserien | 6 | 85 | 0 | 0 | — | 6.65 |
| 2016 | 1. Division | 12 | 511 | 0 | 0 | 0 | — |
| 2017 | Eliteserien | 6 | 104 | 0 | 0 | 0 | 6.58 |
| 2018 | Eliteserien | 1 | 8 | 0 | 0 | — | 6.43 |
| 2018 | 1. Division | 10 | 766 | 0 | 0 | 0 | — |
| 2019 | 1. Division | 21 | 1373 | 1 | 0 | 0.07 | — |
| 2020 | 1. Division | 16 | 696 | 1 | 1 | 0.26 | — |
| 2021 | 2. Division - Group 1 | 18 | 1211 | 1 | 0 | 0.07 | — |
| 2022 | 1. Division | 21 | 1731 | 0 | 3 | 0.16 | — |
| 2024 | 1. Division | 18 | 863 | 0 | 0 | 0 | 6.83 |
| 2025 | 1. Division | 29 | 1543 | 0 | 3 | 0.17 | 6.43 |
| 2026 | 1. Division | 11 | 938 | 0 | 0 | 0 | 6.57 |
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 2026-07-24
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Brann | 7 | 1 | 2 | 4 | 0 | 0 | 1 | 0 |
 Moss | 6 | 3 | 1 | 2 | 0 | 2 | 0 | 0 |
 Lillestrøm | 6 | 1 | 1 | 4 | 0 | 0 | 0 | 0 |
 Viking | 5 | 2 | 1 | 2 | 0 | 0 | 1 | 0 |
 Aalesund | 5 | 1 | 1 | 3 | 0 | 0 | 0 | 0 |
 Stabæk | 5 | 2 | 1 | 2 | 0 | 0 | 0 | 0 |
 Rosenborg | 5 | 0 | 0 | 5 | 0 | 0 | 0 | 0 |
 Start | 5 | 3 | 1 | 1 | 0 | 0 | 0 | 0 |
 Sogndal | 5 | 2 | 2 | 1 | 0 | 0 | 0 | 0 |
 Raufoss | 5 | 1 | 4 | 0 | 0 | 0 | 1 | 0 |
 Vålerenga | 4 | 1 | 3 | 0 | 0 | 0 | 0 | 0 |
 Ranheim | 4 | 1 | 2 | 1 | 0 | 0 | 0 | 0 |
 Mjøndalen | 4 | 3 | 1 | 0 | 0 | 0 | 0 | 0 |
 Åsane | 4 | 0 | 2 | 2 | 0 | 0 | 0 | 0 |
 Egersund | 4 | 3 | 1 | 0 | 0 | 0 | 1 | 0 |
 Lyn | 4 | 3 | 1 | 0 | 0 | 0 | 0 | 0 |
 Molde | 3 | 0 | 2 | 1 | 0 | 0 | 0 | 0 |
 Odd | 3 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
 Hødd | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 |
 Bodø / Glimt | 3 | 2 | 0 | 1 | 0 | 0 | 0 | 0 |
Mathias Gjerstrøm's 11 outings in the 2026 1. Division (938 minutes) produced no goals and no assists. That season graded out at an average match rating of 6.57.
His best-rated season remains 2024 (6.83, 1. Division); his lowest was 2025 (6.43). The direction of late is downward — 0.19 under his prior average over the last two rated seasons.
