The effort to keep performance-enhancing substances out of professional sport has erupted again. The United States Anti-Doping Agency stripped bicyclist Lance Armstrong of his record-shattering seven Tour de France titles. Major League Baseball suspended Melky Cabrera, an All-Star Game most valuable player, and Bartolo Colon, a former Cy Young Award winner, each for 50 games, because they used artificial testosterone.
But there's a big difference between the Armstrong case and the others. Armstrong never tested positive for banned substances. The baseball players did.
Armstrong has been suspected for years of cheating with illegal substances. But the fact remains that he never failed any of the hundreds of blood and urine tests that he underwent as part of his sport. The case against him appears to be based mostly on the testimony of other cyclists.