He appeared in the 2012 Critérium du Dauphiné suddenly. After a week of racing through the Alps, the then 20-year-old Wilco Kelderman placed eighth overall and won the youth classification. In the fourth stage, a time trial of over fifty kilometres, he slotted in fourth place. Only Bradley Wiggins, Tony Martin and Michael Rogers went faster. Keen eyes would have seen him a few weeks earlier in the Tour of California, where he worked for eventual winner Robert Gesink and placed seventh overall. Again, he was the best young rider.
Kelderman confirmed his status as a rising star in 2013. He placed sixth in the Tour Down Under, fifth in the Tour de Romandie and won the Tour of Denmark. In the Giro d'Italia, his first Grand Tour, he rode to third overall in the young rider classification and 17th in the general. Progress continued in 2014. Kelderman bagged top ten finishes in overall classifications of several big stage races. He even managed to place seventh in the Giro. In 2015, he will be allowed to prove himself in the Tour de France.