In 2010 he won the Girobiostage race; the amateur version of the Giro d'Italia; and in 2011 he won his first professional race at the Giro dell'Emilia. Betancur had been scheduled to join the team in 2012, but remained with. Betancur left at the end of the 2012 season, and joined on a two-year contract from the 2013 season onwards.
Ag2r–La Mondiale (2013–15)
He started his 2013 season with a seventh-place finish at the Tour of the Basque Country, including a second place on stage 3. He went on to light up the Ardennes Classics, coming 3rd at La Flèche Wallonne after an early attack with just over to go and scoring a 4th place in Liège–Bastogne–Liège, where it was his attack which created the final select group of six who contested the finish. After a 12th-place finish at the Tour de Romandie, Betancur went in to the Giro d'Italia as an outsider for a top 10 GC position. Initially things went poorly, as he lost time on the descent of stage 3 and on the long time trial of stage 8, by the end of which he was down in 28th position, 6:08 down on the leader and eventual winner Nibali. However, following second places on stages 9, 10, and 15, and some brilliant performances in the other mountain stages, he worked himself up to 7th place and just two seconds off the white jersey for the best young rider by the penultimate stage. On the final mountain stage, although he punctured at the bottom of the final climb, he managed to catch up and overtake most of his GC rivals, finishing 4th on the day. He ended the Giro as best young rider and 5th in the general Classification. In December 2013, Betancur confirmed he would be focusing on the Tour de France for 2014. However, he failed to fly from his training base in Colombia to France on 3 June, blaming a viral infection, and changed his target to the Vuelta a España. In August 2015 announced that they had come to an agreement with Betancur to release him from his contract with the team, which was due to run until the end of 2016.
In October 2015, the announced that they had agreed an initial two-year deal with Betancur from 2016. Betancur won his first race for the team – the first stage of the 2016 Vuelta a Castilla y León – ending a 760-day wait for a victory. The last race he had won was the 2014 Paris–Nice. In June 2017, he was named in the startlist for the 2017 Tour de France.
