NEW YORK (AP) — The NFL says it has reached an agreement with the players association on changes to its performance-enhancing drug policy, including the addition of human growth hormone testing.

The league said Wednesday that under the new rules, three previously suspended players — the Broncos’ Wes Welker, Cowboys’ Orlando Scandrick and Rams’ Stedman Bailey — will be eligible to return to their teams this week.

Testing for HGH was originally agreed upon in 2011, but the players had balked at the science in the testing and the appeals process for positive tests. Under the new deal, appeals of positive tests in the PED program will be heard by third-party arbitrators jointly selected by the NFL and union.