Having reached the professionals at the age of 24, he amassed Segunda División totals of 226 games and one goal, mainly at the service of Celta. He also competed in La Liga with the club, in the 2012–13 season.
Bustos won promotion to La Liga with Celta in 2012, as runners-up.[6] He made his debut in the competition on 18 August of that year, playing 79 minutes in a 0–1 home defeat to Málaga,[7][8] and scored his first official goal for the side on 12 December, in a 2–1 win over Real Madrid at the Balaídos in the Copa del Rey.[9]
As early as 8 January 2013, rumours arose of Bustos joining Sporting de Gijón, as a result of which he was left out of the squad to face Real Madrid in the second leg.[10] The next day, he was loaned out to the club until June,[11] and subsequently the agreement was extended for a further season.[12]
Mallorca
Bustos' contract with Celta was terminated by mutual consent on 30 June 2014,[13] and the following month he signed for RCD Mallorca of the second tier.[14] He scored his first goal for his new team on 3 January 2015, in the 46th minute of a 2–0 home victory over Albacete Balompié.[15]
Mumbai City
On 30 July 2015, Bustos moved to Indian Super League franchise Mumbai City FC;[16] upon joining, the 32-year-old said that he was "excited for the opportunity to play outside Spain".[16] He made his debut on 10 October, playing the full 90 minutes in a 0–0 away draw with Kerala Blasters FC.[17]
Later years
Bustos retired in 2018 at the age of 35, following spells with Lorca FC[18] and UCAM Murcia CF.[19] In the 2016–17 campaign, the veteran contributed 40 games (playoffs included) as the former reached the second division for the first time ever.[20]
^Montiel, Cayetano (18 January 2018). "Cristian Bustos, del Lorca al UCAM" [Cristian Bustos, from Lorca to UCAM]. La Opinión de Murcia (in Spanish). Retrieved 13 December 2021.