Andrés Bayron Silva Lemos is a Uruguayan track athlete. He competed in the combined events on the youth and junior levels, but has since specialized in the 400 metres and 400 metres hurdles.

The 2007 South American Championships in Athletics were held at the Estádio Ícaro de Castro Mello in São Paulo, Brazil from 7 June to 9 June 2007. A total of 44 events were contested, of which 22 by male and 22 by female athletes. Continuing in their traditional dominant role, the hosts Brazil easily topped both the medal and points tables, having won 28 gold medals and 61 medals in total. The next best team was Colombia who had a haul of seven golds and 26 overall, while Argentina took third with 13 medals of which 4 were gold.