(Frisco, TX)  --  Former 49er and Raider Aldon Smith is back in the NFL.  He received conditional approval yesterday to allow him to play this season for the Cowboys.  Smith has not appeared in a game since 2015.  He has struggled with alcohol abuse and legal issues, including domestic abuse. The Cowboys signed Smith to a one-year four-million dollar contract in March. He logged 47-and-a-half sacks in five seasons with the 49ers and Raiders before multiple-suspensions derailed his career.