2023 MotoGP World Championship
The 2023 FIM MotoGP World Championship is the 75th edition of the F.I.M. Francesco Bagnaia entered the season as the reigning world champion.

Team changes 

 Suzuki withdrew from the MotoGP class at the end of the 2022 season.
 Tech3 KTM Factory Racing were rebranded as GasGas Factory Racing Tech3. The team used KTM bikes. Tech3 continued to own and operate the team.
 RNF Racing switched to Aprilia after a season with Yamaha.

Rider changes 

 Álex Rins moved to LCR Honda from the now defunct Suzuki MotoGP team, replacing Álex Márquez.Jack Miller moved to the KTM factory team from the Ducati factory team, replacing Miguel Oliveira. Oliveira then moved to RNF Aprilia MotoGP Team.
 Álex Márquez moved to Gresini Racing MotoGP from LCR Honda, replacing Enea Bastianini. Bastianini was then promoted to the Ducati factory team, replacing Jack Miller.
 Jack Miller moved to the KTM factory team from the Ducati factory team, replacing Miguel Oliveira. Oliveira then moved to RNF Aprilia MotoGP Team.
 After being left without a place in the MotoGP grid, Darryn Binder went down to Moto2 to make his debut in that class.
 Pol Espargaró moved to the newly rebranded GasGas Factory Racing team from the Honda factory team. He was replaced by Joan Mir, who moved from the now defunct Suzuki MotoGP team.
 Raúl Fernández moved to RNF Aprilia MotoGP Team from Tech3 KTM Factory Racing.
 Remy Gardner left MotoGP for the Superbike World Championship. He was replaced by 2022 Moto2 World Riders' Champion Augusto Fernández, who entered the MotoGP class with the rebranded GasGas Factory Racing team.
 Andréa Dovizodio retired after the 2022 San Marino round. He was replaced by Cal Cruchlow for the end of the season. In 2023, Cal Cruchlow returned to his position as test and replacement rider at Yamaha.

Mid-season changes 

 Pol Espargaró missed seven Grands Prix starting from the Argentine round after suffering numerous injuries during P2 of the Portuguese round. He was not replaced for the Argentine round, but was replaced starting from the Americas round by Jonas Folger.
 Enea Bastianini missed several races during the season. He missed the Argentine and Americas rounds after suffering a fractured right collarbone due to a collision with Luca Marini in the sprint of the Portuguese round. He was not replaced for the Argentine round, and was replaced for the Americas round by Michele Pirro. Bastianini also missed the French round after a failed return in the Spanish round which saw him withdraw from the race after P2 due to continuous shoulder pain. He was replaced by Danilo Petrucci. Bastianini also missed the San Marino, Indian, and Japanese rounds after undergoing surgery on his fractured left ankle and left hand that were sustained during the Catalan race. He was not replaced for the San Marino round, and by Pirro again for the Indian and Japanese rounds.
 Marc Márquez missed several races after suffering a broken first metacarpal due to a collision with Miguel Oliveira during the main race of the Portuguese round. He was not replaced for the Argentine round, replaced by Stefan Bradl for the Americas round, and was replaced by Iker Lecuona for the Spanish round.
 Miguel Oliveira missed the Argentine round due to the aforementioned collision with Márquez during the main race of the previous Portuguese round. Oliveira was declared unfit after further testing and was not replaced. Oliveira also missed the French round after he sustained a shoulder injury after a collision with Fabio Quartararo during the previous Spanish round and was replaced by Lorenzo Savadori.
 Joan Mir missed the German and Dutch rounds after suffering a right hand injury during P2 of the previous Italian round. He was not replaced for the German round, but was replaced by Iker Lecuona for the Dutch round.
 Álex Rins missed seven Grands Prix starting from the German round after undergoing surgery on a broken right leg that was sustained during the sprint of the Italian round. He was not replaced for the German round, by Stefan Bradl for the Dutch and Indian rounds, by Iker Lecuona for the British, Austrian, and Catalan rounds, and by Takumi Takahashi for the San Marino round. He competed during Friday practice sessions for the Japanese round, before being replaced by Bradl after he was declared unfit for the rest of the weekend.
 Álex Márquez missed the Japanese round after suffering a double rib fracture during Q1 of the previous Indian round. He was not replaced.
 Luca Marini missed the Japanese round after suffering a fractured left collarbone during the sprint of the previous Indian round. He was not replaced.

Calendar