Born on 31 May 1992 in the Netherlands, Kelle Roos stands as an impressively tall goalkeeper for Kilmarnock at 6ft 5in (1.96m) and carries a solid 14st 2lb (90kg) frame. He proudly wears the number 13 jersey, which suits his position between the sticks. His journey through various football clubs has placed his current market value at approximately £235k, as reported by Transfermarkt.
Roos began his professional football career at NEC Nijmegen in the Eredivisie in the Netherlands back in July 2012. He then transferred to RKSV Nuenen, a club in the Topklasse in the Netherlands, in July 2013, before joining Nuneaton Town in the National League North in England in November of the same year. In his debut season with Nuneaton Town (2013 - 2014), Roos took to the field nine times in league matches.
In January 2014, Roos left Nuneaton to join Derby County in the Championship in England for a fee reported around £25k. He had slightly fluctuating yet notable number of league appearances for Derby County: 16 in season 2018 - 2019, 22 in season 2019 - 2020, 14 in season 2020 - 2021, and 18 during the season 2021 - 2022.
During the summer of 2015, Roos temporarily left Derby County to play for Rotherham United in the League One in England on loan, where he made four first team appearances in league matches that season. He returned to Derby in September that year.
In February 2016, Roos was loaned to AFC Wimbledon in the same division. During his short stint there, he managed to start 17 league matches. His loan ended in June, and he once again returned to Derby County.
A month later, in August 2016, Roos found himself loaned to Bristol Rovers in the League Two in England. Roos featured in 16 league matches for the Rovers during the 2016 - 2017 season.
In September 2017, Roos was loaned to Port Vale in the League One in England, making eight league appearances, before being loaned again to Plymouth Argyle in the same league in December. Roos made only four league appearances for Plymouth Argyle during the 2017 - 2018 season but quickly returned to Derby.
Roos' time in Derby ended in July 2022, when he transferred to the Scottish Premiership to play for Aberdeen. He had two substantial seasons with the Scotts, making 31 and 37 league appearances successively in the 2022 - 2023 and 2023 - 2024 seasons.
In July 2024, Roos left Aberdeen to join Triestina in the Serie C in Italy. A year later, he moved to Notts County in the League Two in England, before being loaned out to Kilmarnock in the Scottish Premiership in January 2026. He made five league appearances for Kilmarnock in the ongoing 2025 - 2026 season. He has also represented Kilmarnock once in the Scottish Cup 2025 - 2026 competition.
