I'll bet anything that Dukes does plenty of squats/leg presses and doesn't work the hamstrings as hard (with lots of heavy hamstring curl sets). You can do stretching all day long, but hammy-pulls will still occur when the quads get over-developed in relation to the hamstring, and you can tell how built-up Dukes' quads are.
You may be on to something there.
This is going to be a LOOOOOOOOOOONG four game series.
Imagine what it will be like tomorrow for the doubleheader!