Juan Manuel López de Jesús (born December 27, 2005), often known by his nickname "Juanmita", is a Puerto Rican profesional boxer.

As a juvenile he was a multiple-time national champion and medalist at the 2022 IBA Youth World Boxing Championships as a minimumweight and light flyweight.

[11] Even as a teenager, López also enjoyed studying his father’s fights and scouting videos of his opponents, being regarded by longstanding trainer Álex Caraballo as a student of the sport.

The COVID-19 pandemic halted sports in Puerto Rico for some time, during which López was a student-athlete at the Albergue Olímpico school at Salinas from which he graduated with honors.

[7] While attending this institution, he won the Juegos de Puerto Rico, organized by the Department of Sports and Recreation (DRD).

[5] In October 2021, López entered the XI Copa Cinturón de Oro, advancing by defeating Alan Dumacela of Ecuador (5:0).

López competed at the minimumweight division (46–48 kg) of the 2022 IBA Youth Boxing Championships, winning his debut over Luka Beshliogli of Georgia (5:0).

[18] After winning a bronze medal at the Continental Championship, the Federation began considering him and Carlos de León as top priority for the upcoming Olympic trials, integrating both to the training sessions of the senior national team despite neither being 18 years old at the moment.

[19] In December 2023, López won the adult Puerto Rico National Championship at the Juan Evangelista Venegas Tournament, winning the opportunity to fight for a berth at Paris 2024.

López, who had gathered an amateur record of 55-10 (5 Kos) which included a three year undefeated streak in Puerto Rico, joined the adult national team despite not meeting the minimum age requirement until the last week of that month.

[26] In June, he joined Ashleyann Lozada at Europe to participate in camps at Granada, Madrid and Dijon, before finally traveling to Paris.