MLB Diamond Demo by Al Leiter and John Smoltz about hand separation and the position of the elbows and hands during a pitcher's stride. This is on the heels of the Washington Nationals' Stephen Strasburg's impressive return this week from Tommy John surgery.
As I noticed myself on Tuesday night, Leiter and Smoltz say that the "inverted W" that some think may have contributed to Strasburg's UCL tear is still present in his mechanics, but the violence of his arm action has been slightly toned down.
Smoltz demonstrates in the video a drill that he performed during his own rehab period from Tommy John. This looks like a great way for young pitchers to reinforce proper hand separation at an early age, so they don't have to make major changes down the road.