Early career In 2013 and 2014, Gosiewski played for the
South Sydney Rabbitohs'
NYC team, captaining the side in 2014. In 2015, he graduated to their
New South Wales Cup team,
North Sydney Bears. At the conclusion of the 2015 season, he played 18 games for North Sydney and scored 4 tries.
2016 In round 10 of the
2016 NRL season, Gosiewski made his
NRL debut for South Sydney against the
Parramatta Eels. He played a total of 5 games for South Sydney in 2016, for most of the season though, he featured for North Sydney, making 9 appearances and scoring 3 tries. In October, he re-signed with Souths on a one-year contract until the end of 2017.
2017 Gosiewski spent most of the
2017 NRL season out with a torn patella. in May 2017 After getting match fitness and game time with South Sydney's feeder club North Sydney, he was recalled to the South Sydney lineup and played his sole
NRL game of the season in South Sydney's 36-18 victory over the
New Zealand Warriors. After not being offered a new contract by Souths, he signed a one-year contract in September, with the
Manly-Warringah Sea Eagles starting in 2018.
2018 Gosiewski made his debut for Manly in round 5 against the
Gold Coast Titans. Gosiewski featured in 8 games for Manly as the club endured a torrid 2018 season finishing second last on the table. Gosiewski resigned for the
Manly Warringah Sea Eagles for another season, keeping him at the club until the end of 2019.
2019 In round 22 of the
2019 NRL season against
Wests Tigers, Gosiewski scored two tries as Manly-Warringah won the match 32-12 at
Brookvale Oval. Gosiewski played 19 games for Manly in the
2019 NRL season as the club finished 6th on the table and qualified for the finals. Gosiewski played in both of Manly's finals matches and scored a try in the club's elimination final loss against
South Sydney at
ANZ Stadium.
2020 In round 19 of the
2020 NRL season, he scored two tries for Manly-Warringah in their 24-42 loss against the
Gold Coast at
Brookvale Oval. He played a total of 13 games for Manly-Warringah in the
2020 NRL season as they finished a disappointing 13th on the table.
2021 Gosiewski played six games for Manly in the
2021 NRL season. On October 6, he was released by the Manly club. On October 15 Gosiewski signed a one-year deal with the
St. George Illawarra Dragons for the 2022 season.
2022 Gosiewski played four games for St. George Illawarra in the
2022 NRL season as the club finished 10th on the table and missed the finals. On 25 October, Gosiewski signed a one-year deal to join
North Queensland starting in 2023.
2023 Gosiewski was limited to only seven matches for North Queensland in the
2023 NRL season as the club finished 11th on the table.
2024 On 29 March, Gosiewski asked North Queensland for an immediate release on compassionate grounds which was rejected by the club. On 29 April, Gosiewski was granted an immediate release from his North Queensland contract to join arch-rivals Brisbane until the end of 2025. He made six appearances for Brisbane in the
2024 NRL season which saw the club miss the finals finishing 12th on the table.
2025 On 17 April, it was announced that Gosiewski would be ruled out for eight weeks with a fractured arm. He played 14 games for Brisbane in the
2025 NRL season but did not feature in the clubs finals campaign nor their
2025 NRL Grand Final victory over Melbourne. In mid-October, Brisbane announced that Gosiewski had signed on with the club for a further year.
2026 On 19 February, he played in Brisbane's
World Club Challenge loss against
Hull Kingston Rovers. == Statistics ==