The fake-to-third, throw-to-first pickoff move is now a balk - CBSSports.com
Giving signs after pickoffs :
On Andy Pettitte's Pickoff Move | FanGraphs Baseball
If the pitcher steps off the rubber in an attempt to pick off a runner at first and the throw goes out of bounds, is the runner awarded one base or two
What is a Balk?
Baseball's never-before-seen pick-off move | For The Win
The art of the pick-off | Baseball | tiogapublishing.com
Coaching the Beginning Pitcher: The Third-to-First Move by Dan Keller | HittingWorld.com
Teaching Right-Handed Pitchers A Pick-Off Move To First Base