Martavis Bryant has formally applied to the NFL for reinstatement, according to a source.

The league suspended the wide receiver indefinitely in December for Bryant's repeated violations of the league's drug policy.

Bryant, 27, was a fourth-round pick of the Steelers in 2014 but has missed 36 of a possible 80 regular season games because of suspensions.

Since the end of last season, a source said, Bryant has worked with the NFL and the NFL Players Association to address his mental health and put himself in a position where he thinks his application for reinstatement has a chance to succeed.