Cleveland Browns wide receiver Josh Gordon is facing a season-long suspension after another failed drug test months ago, this time for marijuana, sources told ESPN's "Outside the Lines" on Friday.

Reached by phone Friday afternoon, Gordon said: "That's something you're going to have to talk to [agent] Drew Rosenhaus about. I really don't know anything about it."

Asked whether he planned to dispute the test, Gordon said: "I'm going to have to find out about that later. You need to call Drew." Gordon then hung up the phone.

Rosenhaus declined to comment, other than to say the information was "not true."

The 23-year-old Gordon was expected to be the top target for quarterback Brian Hoyer or newly drafted Johnny Manziel this season.

Despite being suspended without pay for two games and losing two additional game checks last season for his earlier violation of the league's drug policy, Gordon led the Browns with 87 receptions and had nine touchdowns. He led the NFL with 1,646 receiving yards and became the first player with consecutive 200-yard receiving games.

He said last year's suspension was the result of using cough syrup that contained codeine -- a banned substance under the NFL's policy.

Two sources told "Outside the Lines" on Friday that Gordon's latest violation is the result of marijuana being found during a drug test. One source said Gordon received a letter in early winter from a league physician stating he had failed a test. A second letter, informing Gordon that he faced a 16-game suspension but had the right to appeal, was sent in late April.