The NFL has spoken with the World Anti-Doping Agency about overseeing testing of players for performance-enhancing drugs, an NFL official told The New York Times, if a federal appeals court forces owners to end their lockout of players and put in place rules for operating the league.

Bringing in WADA could, the paper reports, lead to blood testing for human growth hormone. (Commissioner Roger Goodell recently took an HGH blood test. The NFL Players Association, presently decertified as a union, has traditionally opposed blood testing.)

George Atallah, spokesman for the NFL Players Association, had no comment on the report.

The NFL is considering other drug-testing agencies, as well, including the National Center for Drug Free Sport, which currently collects urine samples for the league’s tests.