[5][6] Malpica debuted in senior international competition at the 2016 Pan American Championships, where she won bronze in the all-around behind Natália Gaudio and Karla Diaz.

[11][12] She was then selected for the Central American and Caribbean Games, where she won gold with hoop and ball and silver in the all-around and with clubs.

[27] Marina started her 2022 season at the World Cup in Portimão, where she finished 26th in the all-around, 31st with hoop, 36th with ball, 17th with clubs, and 19th with ribbon.

[29] In July, she performed at the Pan American Gymnastics Championships, where was 5th in the all-around and won gold with hoop and bronze with ribbon.

[30] In August, she competed at the last World Cup of the season in Cluj-Napoca, ending 26th in the all-around, 17th with hoop, 22nd with ball, 36th with clubs, and 15th with ribbon.

[34] In late June, she competed at the Central American and Caribbean Games in San Salvador, where she won five golds and a silver - a gold in the team event with Ledia Juárez, Karla Diaz, and the senior group, and every individual final except for the clubs final, where she was silver behind Juárez.

[35] She represented Mexico at the 2023 World Championships in Valencia, Spain; she finished in 29th place in the all-around qualifications and did not qualify to the final.

Malpica made comments on her social media criticizing the Brazilian gymnasts and accusing the judges of bias based on nationality.

[39] At the 2024 Pan American Championships in Guatemala City, she won bronze in the ribbon final behind Maria Eduarda Alexandre and Bárbara Domingos.