4 seam or 2 seam?

I would think you would use both, whether in showcases or otherwise.

Ummmmm, wasn't this already discussed at length sometime back?

Texan,
If this was discussed a while back, could you share what thread it was in? I did a search and can't seem to find it. thanks.

mm77,
My son throws both fastballs as well with the same difference in velocity and movement. The key to both is location as well as mixing them with the changeup and curveball. He typically locates the 4 seam to the outside corner at the knees on a righty and rides the 2 seam into the righty...gets a lot of weak ground balls/pop ups with the 2 seam. Every now and again he goes up top with the 4 seam on an 0-2 or 1-2 count to cross up the hitter looking for the slow stuff.

My advice is to also show off both fastballs, especially if he can locate them well. The coaches/scouts that are watching will see the movement on the 2 seamer and notice the change in speed. But he should throw several 4 seamers to show his speed and ability to locate the heat.