( CNN ) -- A lawyer for Roger Clemens strongly denies the seven-time Cy Young Award winner used steroids to pump up his body and his pitching statistics . Roger Clemens has won seven Cy Young Awards pitching for several teams , including the New York Yankees . Clemens , considered a shoo-in for the Baseball Hall of Fame someday , was prominently featured in the report on performance-enhancing drugs that former Senate Majority Leader George Mitchell released Thursday . `` Roger Clemens adamantly , vehemently , and whatever other adjectives can be used , denies that he has ever used steroids or ... improper substances , '' Clemens ' attorney , Rusty Hardin , said Thursday . `` He is really , really concerned and upset that he has been named in this report . It 's based on the allegations , apparently , of a trainer that he 's had in the past . ... That 's not a standard someone should be held out in public to have done something as serious as using steroids in baseball . '' Watch Hardin critique report » . The report says Brian McNamee , a former Toronto Blue Jays strength coach , testified that Clemens received injections of the steroid Winstrol in Clemens ' Toronto , Ontario , apartment in 1998 . McNamee `` injected Clemens approximately four times in the buttocks over a several-week period with needles that Clemens provided , '' the report said . It said Clemens ' pitching improved during that time . `` During this period of improved performance , Clemens told McNamee that the steroids 'had a pretty good effect ' on him , '' the report said . The report said McNamee also injected Clemens with testosterone and human growth hormone after Clemens moved to the New York Yankees in 2000 . `` Roger has been repeatedly tested for these substances and he has never tested positive , '' Hardin said in a statement . `` There has never been one shred of tangible evidence that he ever used these substances and yet he is being slandered today . '' Hardin told reporters that Clemens had not been given the opportunity to defend himself . `` It 's not right to put somebody in a report with this kind of allegation and lack of proof , because there 's nothing he can do to combat it , '' Hardin told reporters . `` He 's not being charged with anything , he has just been smeared with something . '' Hardin said his client was `` outraged that his name is included in the report based on the uncorroborated allegations of a troubled man threatened with criminal prosecution . '' Mitchell said he did what Major League Baseball asked of him . `` I did what I was asked to do as fairly and as thoroughly and as accurately as I could , '' Mitchell said Friday on CNN 's `` American Morning . '' Mitchell said he had enough witness reports , checks and admissions to justify going public with players ' names . `` I think it 's quite wrong to say there 's no concrete evidence , '' he told CNN . `` There 's several hundred pages of evidence . '' Mitchell said he invited everyone named in the report to meet with him before the report was issued , but almost all declined . Don Fehr , president of the Major League Baseball Players Association , said Thursday the union was not consulted . That `` left us no choice but to represent our members in this inquiry , '' he said , as any union would protect its members in the face of possible sanctions . He said the association did not tell players not to cooperate with the investigation , but advised them `` on the legal lay of the land '' and suggested they retain their own counsel . `` Many players are named . Their reputations have been adversely affected , probably forever , even if it turns out down the road that they should not have been , '' Fehr said . After a Cabinet meeting on Friday , President Bush -- former owner of the Texas Rangers -- weighed in on the Mitchell report . `` Like many fans , I 've been troubled by the steroid allegations . I think it 's best that we not jump to any conclusions on individual players , '' he said in the White House Rose Garden . `` Steroids have sullied the game , and players and the owners must take the Mitchell report seriously ; I 'm confident they will , '' Bush said . `` And my hope is that this report is a part of putting the 'steroid era ' of baseball behind us . '' He noted the influence that professional athletes have on young people . `` I urge those in the public spotlight , particularly athletes , to understand that when they violate their bodies they 're sending a terrible signal to America 's young . '' In The New York Times , Hardin said innocent players would be smeared with the guilty . `` He has thrown a skunk into the jury box , and we will never be able to remove that smell , '' Hardin told The Times . E-mail to a friend .
Bush says he hopes report helps put `` steroid era '' in past . The Associated Press contributed to this report. There has never been one shred of tangible evidence '' Report author Mitchell says he has witnesses , paper trail . Mitchell : Most players named in report chose not to meet with him .