Orbea and Euskaltel–Euskadi (2008–2011)

Born in Getxo, Basque Country, Spain, Castroviejo spent two seasons with the feeder team of the de facto Basque national squad Orbea–Oreka SDA, before he joined Euskaltel–Euskadi in 2010. He won his first race as a professional at the 2011 Tour de Romandie, clocking the fastest time in the 3.5 km (2.2 mi) prologue individual time trial, beating reigning under-23 world champion Taylor Phinney by 0.27 seconds. The result came the day before Castroviejo's 24th birthday.^[7] His prowess in the time trial was relatively uncommon for a Euskaltel–Euskadi rider, as the team was known for fielding lightweight climbers with little ability against the clock. The Romandie stage win was, however, not a complete shock – earlier in the season, Castroviejo had finished eighth in the time trial which closed out Tirreno–Adriatico, besting the times of riders such as Gustav Larsson, Cadel Evans, and David Zabriskie, all of whom had reputations as time trial specialists.^[8] Castroviejo turned in another strong time trial later in the Tour de Romandie, taking ninth in the 20.1 km (12.5 mi) long race against the clock, better than Marco Pinotti and Jean-Christophe Péraud (among others), both former champions of their respective nations in the time trial.^[9]

Movistar Team (2012–2017)

Castroviejo moved to the Movistar Team for the 2012 season.^[3] He wore the Vuelta a España's general classification jersey for two stages since his team won the opening Team time trial and he crossed the line first, but lost it two days later to teammate Alejandro Valverde. Castroviejo could not follow the frantic pace set by Alberto Contador (Saxo Bank–Tinkoff Bank) on the final climb of the third stage.^[10]

In 2015, Castroviejo won the Spanish National Time Trial Championships for the second time in his career.^[11]

Team Sky (2018–present)

On 17 August 2017, it was announced that Castroviejo would join Team Sky for the 2018 season.^[12] In his first season with the team, he defended his Spanish National Time Trial Championships title,^[13] won a silver medal in the time trial at the UEC European Road Championships in Glasgow,^[14] and finished in the top-ten placings in the time trial at the UCI Road World Championships in Innsbruck.^[15] He added further national time trial titles in 2019 and 2023.^[16][17]

Grand Tour general classification results timeline

Grand Tour	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Giro d'Italia	—	—	57	—	—	—	—	—	24	23	64	—
Tour de France	—	97	—	24	—	60	70	50	DNF	23	48	15
Vuelta a España	148	—	65	—	36	—	100	—	—	—	—	60