Stephen Strasburg hurt himself on the last pitch thrown to Evan Gattis, a curveball. See below.
Last fastball to Gattis. 98 mph.
Then the curve.
The next three fastballs showed immediate drop in velocity. 96, 94, and 93 mph.
What you can’t see in the images is the shaking uncomfortable body language, but if you watch the video it’s there.
The last moment before the Gattis pitch was the last healthy one for Stras tonight.