Scientists, doctors, and former players testified on human growth hormone (HGH) testing in the National Football League (NFL), and the science behind human performance drugs and the health risks. They told the committee that HGH testing was reliable and should begin immediately in the NFL. Hall of Fame linebacker Dick Butkus praised the NFL Players Association for agreeing to the testing in 2011, but said “now let’s get on with it,” referring to the process which had been held up in part by the association’s concerns over the method of testing.