[3] Mejía first made the podium at the International Racquetball Federation (IRF) World Junior Championship in 2013 in Sucre, Bolivia, where she and Andrea Ramirez won Girls U14 Doubles.

[5] The next year Mejía and Ramirez were on top of the podium again at World Juniors, winning Girls U14 Doubles by defeating Bolivians Wanda Carjajal and Adriana Homsi, 6–15, 15–10, 11–9, in Cali, Colombia.

[7] At 2015 World Juniors in Santo Domingo, Dominican Republic, Mejía lost in the semi-finals of Girls U16 Singles to Jordan Cooperrider (USA), 15–5, 15–11.

[9] In 2016, Mejía lost to Gabriela Martinez of Guatemala in the final of Girls U16 Singles at the World Junior Championships in San Luis Potosi, Mexico, 15–13, 15–7.

In singles, Mejía defeated Guatemalan Gabriela Martínez in the quarterfinals, 11–13, 11–8, 11–9, 11–7, Argentine Natalia Mendez in the semi-finals, 11–4, 11–5, 8–11, 11–5, and in the final Argentina's Maria Jose Vargas, 11–8, 11–6, 11–9.

[15] In doubles, Mejía and Alexandra Herrera won gold by defeating Guatemalans Gabriela Martinez and Maria Renee Rodriguez in the final, 11–6, 11–6, 12–10.

[27] Mejía has been successful both internationally for Mexico and on the Ladies Professional Racquetball Tour, winning six events in her career, and becoming the LPRT's #1 player in 2023.