Nathan Ridings' hopes to compete for his mother's native country, Guatemala, in the 2012 Olympics ended when an unspecified injury led the referee to stop his first-round bout Monday night at the Americas qualifying tournament in Rio de Janeiro, Brazil.
Ridings, of Homer Glen, Ill., was losing 12-4 to Mexico's Oscar Molina, who lives in suburban Los Angeles, when the bout ended in the third round.
Lockport Township High School grad Ridings, who finished second at the Chicago Golden Gloves last month, needed to finish in the top five of the 152-pound class to earn a spot for London.
Oscar Molina's twin brother, Javier, competed for the United States at the 2008 Olympics, losing in the first round.
Ridings, 18, was the last Chicago area boxer with a chance at the 2012 Summer Games.