Hours after the players' union voted Friday to accept an NFL proposal on drug policy changes that included HGH testing, the league says it is not a done deal.

Representatives to the union voted Friday to implement testing for human growth hormone for the 2014 NFL season. HGH testing was originally agreed upon in 2011, but the players have balked at the science in the testing and the appeals process for positive tests.

Some players have complained that the NFL threshold of 15 nanograms per milliliter is so low that anyone within the vicinity of people smoking marijuana could test positive. The threshold has been increased to 35 ng/ml.

Wes Welker and Cowboys cornerback Orlando Scandrick will be eligible to return to their teams, a league source told ESPN NFL Insider Adam Schefter.

Josh Gordon's yearlong suspension has been reduced to 10 games, a source told Schefter.