It all depends on how far you are back in the batters box. If the pitcher is maybe 45 miles per hour then yes grip it tight it makes you swing more level. If the pitcher is 10 miles per hour it does not really matter how you grip it.
no it should last the season if no at least half way
a tailing fastball is also called a two-seam fastball. and you grip it parallel to the seams on the thinnest part of the seams. if you throw it hard enough, it will tail. if you are a right handed pitcher, it will tail in to a right handed batter.
You should consider a glove. But due to the material that grips are made of, they will naturally become slippy. You should consider a polymer coated grip such as a Winn.
Grip. I don't know anything about golf, but the answer to this question you can find anywhere online. (by Solomon Zelman)
When we touch the grip it should be thick and soft and grippy. The best grip company i know are Babolat, Head, Wilson.
As a pitcher I think that the best ball to use is a "Dream Seam" ball because the seams on the balls are bigger so you get a better grip, hanse the name "Dream Seam".
spit on them.
sure.
Grip and silencer
Should not be removed except by the armorer when replacing a damaged pistol grip, or the fire control parts that are held in place by the pistol grip.
It is the true grip of a Master Mason... Cannot and should not be given except on the five points of fellowship...
Yes I even have some... the only problem with it is that the grip is not as good as it should be, but still skatable.