Former Pittsburgh Steelers and Oakland Raiders wide receiver Martavis Bryant has formally applied to the NFL for reinstatement, according to Dan Graziano of ESPN.

Bryant has been working with the league and the NFL Players Association to establish the steps to address his mental health issues "with resources such as therapists and ADHD treatments," Graziano adds.

The troubled wideout was suspended indefinitely in December for breaching the terms of his previous reinstatement.

Bryant was conditionally reinstated in April 2017 after he missed the 2016 campaign due to multiple violations of the NFL's substance abuse policy.

The Steelers traded Bryant to the Raiders for a third-round pick during the 2018 draft. Oakland then waived Bryant last September amid reports of another potential ban, but 10 days later, the team decided to re-sign him to a one-year deal.

The 27-year-old appeared in eight games for the Raiders last season while awaiting the result of his appeal, posting 19 receptions for 266 yards before going on injured reserve with a knee issue.

If reinstated, Bryant would become a free agent.