[4] He won Boys U18 Doubles at the 2013 World Junior Championships in Sucre, Bolivia with Rodrigo Garay, as they defeated Bolivians Conrrado Moscoso and Sebastian Oña in the final, 15–8, 15–14.

[5] Mar again won Boys U18 Doubles at World Juniors in 2014 - this time with Erik Garcia - in Cali, Colombia, as they defeated Americans Sawyer Lloyd and Adam Manilla in the final, 1–15, 15–13, 11–8.

[9] Mar played Men's Singles at the 2016 World Championships in Cali, Colombia, where he defeated Japan's Yuki Nakano, 15–5, 15–6, in the Round of 16, but then lost to American Rocky Carson, 15–9, 15–9, in the quarterfinals.

[10] At the 2016 US Open Racquetball Championships, Mar played doubles with Eduardo Garay, and they lost in the Round of 32 to Daniel De La Rosa and Edson Martinez, 15–4, 15–6.

[16] They upset top seeds Alvaro Beltran and Daniel De La Rosa in the quarterfinals, 15–12, 15–8, then defeated Jansen Allen and Felipe Camacho in the semi-finals, 15–10, 15–12, and Jake Bredenbeck and Jose Diaz in the final, 15–13, 15–12.

[25] At the 2021 US Open, Mar played doubles with Rodrigo Montoya, and they defeated Andree Parrilla and Eduardo Portillo in the quarterfinals, 15–10, 12–15, 11–3, but lost to Alvaro Beltran and Daniel De La Rosa, 15–10, 12–15, 11–8, in the semi-finals.

At the 2022 Capital Classic in Millersville, Maryland, he defeated Andree Parrilla in the Round of 16, 15–10, 15–11, then beat Jake Bredenbeck, 15–7, 15–8, in the quarterfinals, and got a narrow victory over Samuel Murray, 15–13, 15–13, in the semi-finals.

He and Rodrigo Montoya won gold in Men's Doubles, as they defeated Costa Ricans Andrés Acuña and Gabriel Garcia in the final, 11–6, 11–5, 10–12, 9–11, 11–6.

[33] At the 2023 Pan American Games in Santiago, Chile, Mar won Men's Doubles with Rodrigo Montoya, as they defeated Canadians Coby Iwaasa and Samuel Murray in the final, 6–11, 11–7, 12–10, 12–10,[34][35] after beating Costa Ricans Andrés Acuña and Gabriel Garcia in the semi-finals, 11–4, 11–7, 11–4.