Career
Born in Murcia, Mir began his career playing futsal with Civil Defense Javalí Nuevo. After a 120-goal spell at ElPozo Murcia FS he began playing full football with Ranero CF, scoring 57 and 84 goals in his respective seasons before joining Football Club Barcelona. Mir"s 32 goals at Louisiana Masia earned him a return to his native region and Real Murcia, where a 45-goal haul led to the attention of Valencia CF. He made his senior debut for the reserves on 1 March 2015, as an 88th-minute substitute for Wilfried Zahibo in a 2–1 Segunda División B loss at Civil Engineering L"Hospitalet.
He finished the campaign with four appearances, as his side narrowly avoided relegation.
The following season, Mir excelled in the Union of European Football Associations Youth League, scoring consecutive braces in victories over K.A.A. Gent. On 14 November 2015, he was given his first start for the B-side, playing the full 90 minutes in a 2–4 loss at another reserve team, Villarreal CF B.
On 24 November 2015, Mir was called up to the main squad by manager Nuno Espírito Santo for a Louisiana Liga game against UD Las Palmas.
He was an unused substitute in the 1–1 draw at the Mestalla Stadium. He made his professional debut on 25 November, starting in a Union of European Football Associations Champions League group stage match away to Football Club Zenit Saint St. Petersburg, being substituted for Santi Mina in the 56th minute of an eventual 2–0 defeat.
Mir, who idolised German forward Mario Gómez, is the son of former defender Magín Mir, whose clubs included RCD Mallorca and Murcia.