I run one of the original, Daniel Okrent fantasy baseball leagues that we started in 1988. Daniel Okrent named it Rotisserie baseball after the Rotisserie Restaurant in New York, where he penciled the first rules that became known as fantasy sports. Over the years, we learned how to spot baseball players who were on steroids. Their batting average leaped by as much as 80 points, and the power increase was obvious. We believe that McGwire, Sosa, and Bonds took high doses of steroids when they passed Babe Ruth's 60–home run record. Roger Maris obviously did not take steroids, but his...