He also discusses the "serious risks" athletes who give themselves HGH are taking, and estimates some use doses 10 times higher than those prescribed for medical purposes.
Even once scientific issues are resolved, there will be other matters the league and union need to figure out, including who administers the test and what the appeals process will be. The latter could be of particular import in the aftermath of the decision in the New Orleans Saints' bounty case Tuesday, when NFL Commissioner Roger Goodell's suspensions of four players were tossed aside by former Commissioner Paul Tagliabue.
The collective bargaining agreement that ended the NFL lockout 16 months ago included a provision for HGH testing — but only once the NFLPA approved the process.
"The players agreed to HGH testing in the CBA because they believe in a clean game. They did not, however, agree to an artificial timeline to impose a testing protocol that has no transparency in the underlying science nor a fair due process that is outlined," union spokesman George Atallah said.
NFL senior vice president Adolpho Birch, who oversees the league's drug program, said the sport has been "trying to do whatever needed to be done to advance the ball" on HGH testing.
"I am hopeful because, among other things, the hearing presumably will put to rest the questions of whether the test is safe, practical, reliable and appropriate for NFL players," Birch said. "If that occurs, it may present an opportunity for the parties to resume serious discussions on how to implement it, rather than being sort of lost in the trenches discussing the questions about its reliability."