Has Stephen Strasburg Changed His Pitching Mechanics?

Let’s take a look:

Nope. Sure doesn’t look like it based on 30 FPS video, even when you compare a changeup (left, 2010) to a four-seam fastball (right, 2011).

The “falling off” you see on the left is simply him chasing the ground ball Ryan Howard hit to Strasburg’s left side.