The NFL submitted a new proposal for immediate human growth hormone testing as the league and the NFL Players Association continue to negotiate in an effort to have HGH testing in place for the 2013 season, NFL.com reported.
The proposal was submitted to the union on April 24, according to the report, and included a concession that eliminated testing on game days.
The proposal would also call for testing to begin immediately, with samples then being tested and stored until the World Anti-Doping Agency established a standard for acceptable levels.
However, the union would rather start testing after the doping agency has determined the baseline and when full testing is ready to be implemented.
"A population study that both parties agreed to a year ago would have resolved the issue of accuracy," union spokesman George Atallah said, according to NFL.com.
The NFLPA is working on a counter proposal that could be submitted to the league next week.