The National Football League says it'll not begin human growth hormone testing at the start of the 2011 season because of a disagreement with the player's union over testing procedures.
The NFL was set to become the first major US professional sports league to use blood testing for HGH as part of the new collective bargaining agreement, but only if the NFL Players Association agreed to the process.
But a NFL spokesperson says the union refuses to accept the validity of the tests despite them being developed by the World Anti-Doping Agency and are the same ones used in Olympic sports and minor league baseball.
