The legal team for Cleveland Browns wide receiver Josh Gordon will argue in a hearing Friday that its client has disputed test results that were caused from secondhand marijuana smoke, according to sources.

Gordon is appealing the NFL's imposition of a yearlong suspension for a positive test for marijuana.

Gordon's legal team will argue that the positive tests are so marginal that they show uncertainty as to whether the test results were truly positive, and even if so, were the result of exposure to secondhand smoke, according to sources familiar with the case.

Gordon's "A" sample tested at 16 nanograms per milliliter, a bare one nanogram per milliliter above the 15-nanogram-per-milliliter threshold, while Gordon's "B" sample -- which should theoretically be consistent with the "A" sample, as it comes from the exact same specimen -- tested at 13.63 ng/ml, lower than the threshold.

With both samples coming from the same specimen test, the results should be consistent. Gordon's attorneys do not believe their client should be suspended for a year for differing disputed test results, especially when only one was barely higher than the threshold, sources said.

Gordon's attorneys also plan to introduce witnesses who will testify that Gordon's scores indicate he was the victim of breathing in secondhand smoke, according to sources. The league has maintained that it does not intend to suspend players for secondhand smoke.

Josh Gordon's legal team plans to point out inconsistencies between his two test samples that could be due to secondhand smoke, sources say. AP Photo/Mark Duncan

Scientific studies have shown that secondhand smoke exposure can result in the kind of test results similar to those of Gordon. Because of this, Gordon's test results would have been negative for marijuana if considered under other professional sports testing regimens -- including the strict Olympic standard and Major League Baseball -- the federal workplace testing standards and various state testing standards, including California and Nevada, which govern boxing and MMA.

And lastly, Gordon's attorneys also will point out that with their client being subject to over 70 drug tests, there was only one time since his rookie year that a test came back positive for marijuana, and even then, the "A" and "B" samples did not match.

Gordon's arrest in early July in North Carolina was a DWI charge, which is unrelated to the proceedings surrounding his positive marijuana test. It cannot and will not be factored into any discipline that is doled out to Gordon over this violation.

Gordon is facing the indefinite one-year ban for violating the league's substance-abuse policy for at least the third time. If he loses, he'll have to wait a year to apply for reinstatement. Last season, Gordon was suspended two games and docked four game checks for testing positive for what he said was codeine in his prescribed cough medicine.