The report, the first time the exact numbers of off-season tests had been released, said that slightly more than 10 percent of baseball players had been tested for drugs in the 2010 off-season.
For some experts on the testing of athletes, the report’s numbers undercut Selig’s claims about the rigor and effectiveness of baseball’s drug policy. Off-season drug testing is one of the most critical components of a meaningful program, experts generally agree, because it is aimed at monitoring athletes during the time they are most likely to use steroids and other drugs as they recover and build muscle for the coming season.
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In the N.F.L., all players are tested at least once in the off-season, and half of the players are tested twice. The 4,000 off-season tests conducted by the N.F.L. accounted for 40 percent of the sport’s tests each year.