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.

Rubio made his professional debut for Colo-Colo in a pre-season friendly against Deportes La Serena as a starter.

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 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.

[2] 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.

[5] On 8 March 2016, Rubio signed a season-long loan with Major League Soccer side Sporting Kansas City as a Designated Player.

[15] On 31 May 2011, Rubio was called up by Chile national team manager Claudio Borghi to take part in the 28-man pre-list preparatory process for the upcoming 2011 Copa América.

[19] On 6 Nov. 2020, Rubio was called up for Chile's 2022 FIFA World Cup Qualifiers against Peru and Venezuela,[20] but was later released from the squad out of precautions over COVID-19.