| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2014 | Inkasso-Deildin | 2 | 80 | 0 | 0 | — | — |
| 2015 | Inkasso-Deildin | 6 | — | 1 | 0 | — | — |
| 2016 | Ettan: South | 4 | — | 2 | 0 | — | — |
| 2017 | Ettan: South | 14 | 1251 | 1 | 0 | 0.07 | — |
| 2018 | Pepsideild | 22 | 1736 | 1 | 0 | 0.05 | — |
| 2019 | Superettan | 26 | 2223 | 4 | 3 | 0.28 | — |
| 2020 | Superettan | 9 | 682 | 0 | 0 | 0 | — |
| 2021 | Superettan | 22 | 1632 | 1 | 0 | 0.06 | — |
| 2022 | 1. Division | 25 | 1720 | 4 | 1 | 0.26 | — |
| 2023 | 1. Division | 19 | 1527 | 0 | 0 | 0 | 7.51 |
| 2024 | Pepsideild | 19 | 1407 | 1 | 1 | 0.13 | 6.98 |
| 2025 | Pepsideild | 23 | 1663 | 1 | 1 | 0.11 | 6.87 |
| 2026 | Pepsideild | 13 | 899 | 1 | 1 | 0.2 | 6.89 |
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 | ||
|---|---|---|---|---|---|---|---|---|
 KA Akureyri | 5 | 3 | 0 | 2 | 0 | 0 | 0 | 0 |
 FH | 5 | 0 | 4 | 1 | 1 | 0 | 1 | 0 |
 Breidablik | 4 | 1 | 1 | 2 | 0 | 0 | 0 | 0 |
 Vestri | 4 | 2 | 1 | 1 | 0 | 0 | 1 | 0 |
 Stjarnan | 4 | 3 | 0 | 1 | 0 | 0 | 1 | 1 |
 ÍBV | 3 | 2 | 0 | 1 | 0 | 0 | 1 | 0 |
 Víkingur Reykjavík | 3 | 0 | 1 | 2 | 0 | 0 | 0 | 0 |
 Fram | 3 | 1 | 0 | 2 | 0 | 0 | 1 | 0 |
 HK | 2 | 2 | 0 | 0 | 0 | 1 | 0 | 0 |
 Kalmar | 2 | 0 | 1 | 1 | 0 | 0 | 1 | 0 |
 Ranheim | 2 | 1 | 1 | 0 | 0 | 0 | 1 | 0 |
 ÍA | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 KR Reykjavík | 2 | 1 | 0 | 1 | 1 | 0 | 0 | 0 |
 Stjørdals-Blink | 2 | 2 | 0 | 0 | 0 | 0 | 1 | 0 |
 Afturelding | 2 | 2 | 0 | 0 | 0 | 0 | 1 | 0 |
 AFC Eskilstuna | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Mjällby | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Stabæk | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 0 |
 Landskrona | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Kristiansund | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
Player stats against each opponent national team
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Sweden | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Canada | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Estonia | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 El Salvador | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 |
Across 13 Pepsideild appearances in 2026, Bjarni Mark Antonsson Duffield contributed 1 goal plus 1 assist (899 minutes) — 0.2 goal involvements per 90. GioScore's computed rating for the season averages 6.89.
The record shows 13 league seasons for him (2014–2026) across 7 clubs. His best-rated season remains 2023 (7.51, 1. Division); his lowest was 2025 (6.87). His last two rated seasons average 0.37 below his earlier career level.
