[2] He is a three-time Olympian, a multiple-time national record holder, and a two-time champion for the 50 m backstroke at the South American Games.

Teaming with Sergio Ferreyra, Pablo Martín Abal, and José Meolans, Otero swam a backstroke leg with a split of 58.00 seconds.

[8] On his second Olympic appearance in Athens 2004, Otero decided to drop his specialty event, the 200 m backstroke, and experiment with the 100 m butterfly.

He also qualified for the 100 m backstroke by clearing a FINA B-standard entry time of 56.36 from the South American Championships in Maldonado, Uruguay.

Swimming in the same heat, he posted a lifetime best of 55.24 to earn a fourth spot by nearly half a second (0.50) behind winner Jeong Doo-Hee of South Korea.