Comments on: Getting a First Look in 2013 at Joely Rodriguez and Stetson Allie Your best source for news on the Pittsburgh Pirates and their minor league system. Thu, 13 Nov 2014 05:48:00 +0000 hourly 1 By: rburgh Sat, 22 Jun 2013 23:08:06 +0000 The issue isn’t that the AIR is heavier when it;s humid, it’s that the BALL is heavier because the moisture gets into the windings. That’s why they store the balls in a humidor here in Denver. If it were the air that was the issue, a humidor would have no effect.

I think the moisture in the air may also soften the cover a little, which would destroy the ball’s coefficient of restitution. (All non-science nerds have just had their eyes glaze over and roll back into their skulls.) So the ball doesn’t come off the bat as quickly or with as much life.

By: iChuck33 Sat, 22 Jun 2013 21:45:45 +0000 Stetson has had that “legkick” in West Virginia since April, I believe. Also, during bp many players will be more relaxed and take lower-effort swings as it’s just a warm-up, so the difference in his bp swing and his game swing doesn’t surprise me.

By: Tim Williams Sat, 22 Jun 2013 06:11:28 +0000 That’s interesting stuff. I’ve always heard it differently. You hear about places in Arizona, New Mexico, and Nevada being so hitter friendly because of the dry heat, and also because of the altitudes.

And then in nights like tonight the air is incredibly heavy, and you hear people talk about how balls aren’t going to travel far. I’ve heard that a few times.

I saw Allie, Osuna, and Avila all make hard contact tonight on fly balls that ended up short of the wall. They all seemed like guaranteed homers. So that was my theory on why they all fell short. Of course I don’t recall if the wind was blowing in or not at the time.

By: RPoz Sat, 22 Jun 2013 05:51:54 +0000 Tim, from a science nerd (myself) to a baseball-science nerd (that would be you, of course), it is counterintuitive but a baseball will actually carry further in higher humidity air than in lower humidity air.

Basically, it has to do with the fact that water molecules are less dense than other common air molecules. So the more space that water takes up in the air, the less dense that it is. Google it for a much more detailed and better explanation.

So perhaps Allie’s long fly would not have been a home run in a different environment, but more like a routine pop-up?

Anyhow, just thought you might be interested since you are spending all your days in the sauna that is Florida during the summer.