Colin Rösler

After progressing through Manchester City's youth academy, Rösler signed for Eerste Divisie club NAC Breda on a three-year contract in August 2019. He joined NAC on a free transfer as part of a partnership between the two clubs. He initially played in central defence for Breda alongside Roger Riera. He played 11 games for NAC during the 2019–20 Eerste Divisie season. He made 25 appearances during the 2020–21 season, including scoring his first senior goal from close range in a 3–1 win over De Graafschap in March 2021. As his spell at NAC continued, Rösler was increasingly overlooked and made just 8 appearances during the 2021–22 season. On 30 December 2021, it was announced that Rösler had signed for Eliteserien club Lillestrøm SK on a contract until 2024. Lillestrøm paid no transfer fee to NAC, but NAC retained a sell-on fee in Rösler's contract. On 28 December 2022, it was announced that Rösler would join Allsvenskan club Mjällby AIF for the 2023 season. He signed a three-year contract. On 5 August 2024, Malmö FF bought the centre-back for a reported sum of 11 million SEK after the departure of Derek Cornelius. Rösler made his debut appearance for Malmö on 10 August in a 1-0 victory against Halmstads BK. In 2026 he joined Danish team Aarhus GF. He made his debut for the club in the third round of the 2026–27 Champions League qualifiers, where AGF beat Azerbaijani Sabah FK 2-1.

Rösler was capped four times by Norway at under-15 level in 2015, scoring in their 4–4 draw with Northern Ireland. He subsequently played internationally for England under-16s, but in February 2016, pledged international allegiance to Norway. He subsequently played for Norway at under-16, under-17, under-18, under-19 and under-21 levels. Rösler made his debut for Norway national team on 17 November 2024 in a Nations League game against Kazakhstan at Ullevaal Stadion. He substituted the hat-trick scorer Erling Haaland in the 86th minute, as Norway won 5–0.

As of matches played 20 July 2026

Rösler is the son of German football manager and former East Germany international footballer Uwe Rösler. His mother is from Norway. He was named after Manchester City legend Colin Bell, whilst his younger brother Tony was named after fellow City legend Tony Book. Rösler was born in Berlin, but his family moved to Lillestrøm in 2002. He moved to England aged 10, and joined Manchester City's academy a year later.