San Antonio needs an NFL team because Tim Duncan is a quarterback

Is Tim Duncan the greatest power forward in NBA history, or the NFL's best quarterback who never actually played in the NFL? It's a deep question that deserves further exploration after the San Antonio Spurs posted this clip to their official Vine account:

What exactly is Duncan doing here? Why, he's throwing a touchdown pass to Danny Green! Duh. 

Check out the 39 year old's elusiveness in the pocket. And what a throwing motion! Poor Patty Mills can't get a finger on him, and Duncan wins again.