[2] He is a multiple-time Argentine record holder, and a two-time medalist in the breaststroke (both 100 and 200 m) at the 2006 South American Games in Buenos Aires.

[1] Ferreyra made his first Argentine team, as a 23-year-old, at the 2000 Summer Olympics in Sydney, competing in two swimming events.

Teaming with Eduardo Germán Otero, Pablo Martín Abal, and José Meolans, Ferreyra swam a breaststroke leg in a split of 1:02.73.

[1][5] In the 100 m breaststroke, Ferreyra challenged seven other swimmers on the third heat, including three-time Olympians Malick Fall of Senegal and Alwin de Prins of Luxembourg.

[6] In his second event, 200 m breaststroke, Ferreyra recorded a slowest time of 2:20.10 on the first heat, finishing last out of 52 swimmers in the preliminaries.