Ronaldo Deaconu

Deaconu started his professional career with ASA Târgu Mureș in 2016, after having previously played as a junior for FC Steaua București, the Gheorghe Hagi Academy, and Dutch clubs Feyenoord and Twente, respectively. He made his senior debut for Târgu Mureș on 5 August 2016, aged 19, in a 0–3 Liga I loss to Politehnica Iași. During the winter transfer window of 2017, Deaconu moved to fellow league team Concordia Chiajna. He totalled three goals from 55 Liga I matches, before transferring abroad to HNK Gorica on 1 February 2019. He appeared sparingly during his spell in Croatia, and in the summer of that year returned to his country after Sepsi OSK acquired him for €100,000. On 22 July 2020, he played the full 90 minutes as his side lost 0–1 to FCSB in the Cupa României final. On 26 August 2020, Deaconu signed a two-year deal with Gaz Metan Mediaș as a free agent. In the 2020–21 season, he amassed 39 games and eleven goals in all competitions. On 15 October 2021, he scored two long-range goals in the span of two minutes to secure a 2–1 home win over Dinamo București. Following a short stint with China League One club Shaanxi Chang'an Athletic, on 28 July 2022 Deaconu joined Polish side Korona Kielce on a two-year contract. On 8 January 2024, he left the club by mutual consent.

Deaconu was called up by the Romania under-23 team to the postponed 2020 Summer Olympics, appearing once in a goalless draw with New Zealand which led to a group-stage exit.

As of match played 13 September 2026

Deaconu's father is a football fan, and named his son after Brazilian international Ronaldo.