| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2015 | Besta deild | 1 | 19 | 0 | 0 | — | — |
| 2016 | Besta deild | 13 | 272 | 0 | 0 | 0 | — |
| 2017 | Besta deild | 20 | 1300 | 3 | 0 | 0.21 | — |
| 2018 | Besta deild | 21 | 1390 | 5 | 0 | 0.32 | — |
| 2018 | Inkasso-Deildin | 20 | 1800 | 5 | 0 | 0.25 | — |
| 2019 | Besta deild | 20 | 890 | 2 | 0 | 0.2 | — |
| 2020 | Besta deild | 16 | 1134 | 3 | 0 | 0.24 | — |
| 2021 | Besta deild | 20 | 1389 | 4 | 0 | 0.26 | — |
| 2022 | Besta deild | 24 | 2126 | 2 | 1 | 0.13 | — |
| 2023 | Inkasso-Deildin | 21 | 1568 | 2 | 9 | 0.63 | — |
| 2024 | Besta deild | 19 | 1324 | 1 | 1 | 0.14 | 8.46 |
| 2025 | Besta deild | 13 | 524 | 2 | 0 | 0.34 | 6.77 |
| 2026 | Besta deild | 12 | 580 | 1 | 0 | 0.16 | 6.71 |
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 2026-09-01
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Vestri | 4 | 2 | 1 | 1 | 0 | 0 | 1 | 0 |
 FH | 4 | 1 | 1 | 2 | 0 | 0 | 2 | 0 |
 Valur | 3 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
 Stjarnan | 3 | 1 | 1 | 1 | 0 | 0 | 1 | 0 |
 Víkingur Reykjavík | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
 KA Akureyri | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
 Fjölnir | 2 | 1 | 0 | 1 | 0 | 0 | 1 | 0 |
 KR Reykjavík | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Selfoss | 2 | 2 | 0 | 0 | 1 | 1 | 0 | 0 |
 Grótta | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
 Ægir | 2 | 2 | 0 | 0 | 0 | 0 | 1 | 0 |
 HK | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Alanyaspor | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 ÍBV | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Thróttur Reykjavík | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Fylkir | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Fram | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Sindri | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 |
 Breidablik | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 0 |
 Grindavík | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
All of S. Þorsteinsson's 2026 Besta deild output came as goals: 1 goal in 12 games (580 minutes) — 0.16 goal involvements per 90. Per-match rating over the season: 6.71.
His best-rated season remains 2024 (8.46, Besta deild); his lowest was 2026 (6.71).
