Why are D. J. Williams and Ryan McBean banned from 6 games?

The National Football League sentenced to bans the linebacker D. J. Williams and Ryan McBean, a defensive lineman, of the team Denver Broncos for violation of steroid policy. These players were suspended from six games. But they were not banned for application of steroids. They didn’t test positive for steroids or other prohibited products. They were accused in providing “non-human” urine samples to the drug testing officer.
D. J. William claimed that he had never tested for any banned drug during 8 years of his career. He mentioned that he was proud of his records. The football player noted that he was also proud of his manner in that he conducted himself, being an athlete.
Peter Schaffer, the defensive attorney for McBean, claimed that the NFL had violated rights of the defensive lineman. He noticed that since McBean had never tested positive for any prohibited product, the NFL didn’t have any right to sentence him to suspension.
Peter Schaffer claimed that he desired to make it clear that neither D. J. Williams, nor Ryan McBean tested positive for prohibited drugs.
A lawsuit was filed in Denver County Court against suspensions of these football players.
The players confirmed that the drug testing officer had violated certain rules connected with the procedure of collecting urine samples.
Peter Schaffer mentioned that several similarities had been between his client and Ryan Braun. Braun won his appeal linked with his suspension from 50 games for application of testosterone. Ryan Braun could prove that the drug testing officer Dino Laurenzi violated steroid policy.
As for Laurenzi, he was defended and supported by various anti-doping agencies. The WADA also supported this drug testing officer. It was claimed that there was the same procedure of collecting and sending urine samples not only for the MLB but also for the WADA.
But as for the drug testing officer that collected samples of Williams and McBean, he was treated in another way. He was fired by the NFL for improper doing his duty.
At the hearing the NFL administrators admitted that the drug testing officer violated the rules linked with collection of urine samples.
Nonetheless, the appeal on behalf of the football players was rejected.