Dallas Cowboys player Aldon Smith -- who hasn't stepped foot an an NFL field since 2015 -- has been officially reinstated in the NFL, TMZ Sports has confirmed.
The 30-year-old former All Pro defensive end -- who battled substance and legal issues throughout his career -- is finally getting another chance at a comeback.
As we previously reported ... Smtih has been sober and training non-stop at Fox Sports reporter Jay Glazer's Unbreakable gym in West Hollywood in hopes of a return.
Smith signed a 1-year deal worth up to $4 million with the Cowboys in April .