Diego Iván Rubio Köstner (born 15 May 1993) is a Chilean professional footballer who plays as a striker for Austin FC in Major League Soccer.
Club career
Early career
Rubio began his football career with Universidad Católica. However, when he was 14, he took the decision to move to his favorite team Colo-Colo. After one year in the bench with Colo-Colo, in the next season Diego was consecrated in the youth team. After many seasons in the youth ranks, he was promoted to the first professional team in January 2011.
Colo-Colo
Rubio made his professional debut for Colo-Colo in a pre-season friendly against Deportes La Serena as a starter. In other pre-season game, Diego scored his first unofficial goals for the club, in a 3–1 win against Unión Española, in where he scored two goals for his team, being named the man of the match.
His Chilean Primera División came on 14 February 2011 against Unión San Felipe, as an 84th-minute substitution in a 2–0 away defeat. In a Copa Libertadores game played against Santos in Brazil, he scored his first professional goal, but the match finished in a 3–2 loss. On 19 April, Rubio scored his first two goals in the Primera División against La Serena, at 30th and 62nd minute, being named the man of match, in a 4–1 home win. He finally was consecrated in the club in an international game for the Libertadores against Táchira, Rubio gave the 2–1 victory to the club, scoring the two goals of Colo-Colo, after an early goal of Edgar Pérez Greco at 4th minute. After his club's performances, was rumored that Udinese are interested in Rubio.
He played his first derby game against his former youth club Universidad Católica, participating in the equalizer goal of Colo-Colo giving an assistance to Ezequiel Miralles at 81st minute, putting the 1–1 draw. The coach Américo Gallego nominated to Rubio for play the major derby of the Chilean football against Universidad de Chile, however, he only playing 30 minutes in a 2–1 loss.
Sporting CP
On 5 July 2011, Rubio joined Portuguese club Sporting Clube de Portugal for €1.5 million, signing a five-year contract with a €30 million minimum fee release clause.
Loan to Pandurii
On 2 September 2013, Romanian Liga I club Pandurii Târgu Jiu confirmed Rubio was signed on a loan from Sporting, with an option to buy. He debuted in Liga I in the match against Dinamo Bucharest, won by Pandurii 2–1.
Loan to Sandnes Ulf
On 3 February 2014, Rubio joined Tippeligaen side Sandnes Ulf on a season-long loan.
Valladolid
On 31 August 2015, aged 22, signed a four-year contract with Spanish club Real Valladolid.