LA GLORIA — David Renk, the only American bullfighter to confirm his status as a matador at the Plaza Mexico in Mexico City, was seriously injured Sunday while performing at the Santa Maria Bullring. Renk, 42, was fighting a 1,000-pound bull at the bloodless bullfight at about 5 p.m. when a bull pinned him to the ground, cracking seven ribs and collapsing one lung. The other lung was working at only 30 percent capacity when he was rushed to Starr County Memorial Hospital in Rio Grande City, then to Valley Baptist Medical Center in Harlingen, where he remained Monday night....