Major League Baseball player testified Tuesday that he witnessed former pitching ace Roger Clemens being injected with a vitamin as Clemens' defense sought to undermine prosecution claims he received performance-enhancing drugs. Clemens, 49, is on trial for the second time on federal charges of lying in 2008 to the House of Representatives' Committee on Oversight and Government Reform when he denied having used performance-enhancing drugs. The committee was investigating drug use in Major League Baseball.
