Rabobank teams (2010–2016) . Born in
Amersfoort, Kelderman finished in seventh position in the general classification of the
2014 Giro d'Italia. He broke his collarbone in the ensuing off-season while training. and finished in ninth place in the opening
individual time trial. The following year he rode the
Tour de France and placed 32nd overall.
Team Sunweb (2017–2020) Kelderman moved to for the 2017 season. He finished in the top ten of the
Vuelta a España in three successive editions, between
2017 and
2019. At the
2020 Giro d'Italia, held in October due to the
COVID-19 pandemic in Italy, he held the overall lead after stages 18 and 19, but lost time to
Tao Geoghegan Hart and
Jai Hindley; as a result, he finished in third overall.
Bora–Hansgrohe (2021–2022) Kelderman joined the team in 2021 on a two-year contract. He recorded top-five overall finishes at the
Volta a Catalunya, the
Critérium du Dauphiné and the
Tour de France in his first season for the team. In his second season, he finished third at the
Circuito de Getxo.
Team Jumbo–Visma In August 2022, it was announced that Kelderman was to join from the 2023 season, on a three-year contract. In his first season with the team, he finished in fourth place at the
Tour de Suisse, and was a part of
Grand Tour successes for
Jonas Vingegaard at the
Tour de France, and
Sepp Kuss at the
Vuelta a España. ==Major results==