López, born in Buenos Aires, Argentina, started his racing career in 1995 in the Argentine Formula Renault Championship.
[1] For 1998, he switched to the Formula Super Renault Argentina with Ruben Rullo, competing in the full season, and taking three podiums and a pole position; his 66 points were enough for sixth overall.
[2] 2002 saw him remain in the TC 2000 with CL Racing along with his father, and this time the younger López took 18th in the championship, with 13 points, having entered ten events.
[8] In 2004, he switched from the TC2000 to the Turismo Nacional Argentina, entering a Clase 3 Ford Escort in five races; his 24 points saw him finish 36th in the class.
[2] In addition to competing in these two series, he entered a single round of the TC2000, driving for Sportteam Competicion in a Volkswagen Bora;[2] he finished 18th, having started 28th.
[15] In 2009, López returned to the Spanish GT Championship, signing with Aurora Racing Team to partner Peter Sundberg[16] in the #1 Ferrari F430 GT2.
[30] 2011 saw a full-time switch to the International GT Open, with López joining Vittoria Competizioni, and partnering Marco Frezza in a Ferrari F430 GT2.
[2] In 2012, López remained in the International GT Open, but joined Scuderia Villorba Corse, who were entering a Ferrari 458 GT2;[35] he was partnered by Andrea Montermini.