Joan started motorcycling at the age of 10, becoming the Balearic champion in several Mini motorcycle and Minimotard categories. In 2013, he was the only Spanish rider selected to participate in the Red Bull MotoGP Rookies Cup, where he became the runner-up.

During the 2015 season, he raced with the Leopard Racing team in the FIM CEV Repsol and simultaneously substituted the injured Hiroki Ono at the Australian GP in the Moto3 World Championship.

The 2016 season was his first full season in Moto3. His standout moment came with his win at the Austrian GP, having started from pole position.

In 2017, he remained with the same team, but this time riding a Honda. The Balearic rider pulled off a spectacular season and won the world championship in Australia. This title allowed him to move up to Moto2 in 2018 with the Estrella Galicia 0.0-Marc VDS team.

In 2019, he made the leap to the MotoGP World Championship with Suzuki, and in 2020, he became the MotoGP World Champion at the Valencia Grand Prix in the Ricardo Tormo Circuit, with one race to go.

In 2021 and 2022, he couldn’t match his previous success, yet he once again demonstrated remarkable consistency. He achieved 6 podiums throughout these season.

In 2023, he joined Honda as Marc Marquez’s teammate, marking the final season for the Cervera rider with the team.

Despite a challenging 2023 with numerous crashes, Mir approaches 2024 with the idea of returning to the top of the competition.