Have you wondered why you can hit a pitcher one game, and the next time you face him, you can't?   Have you felt, at times, like you just couldn't get your eye on the pitch today?  Wonder why? Actually, it is very explainable, but it is not what the general public thinks. 

In fact, it is not your mechanics, either.  It is primarily caused by more movement on the pitch than you have recently been watching.  In other words; you were in a hitters' park for too many games, prior to going into a pitchers' park.  But sometimes a pitchers' park can be a hitters' park--it's the air density.

As MLB players travel in and out of pitchers' parks and hitters' parks, they each pick up experiences as they play.  However, recent exposure to pitch movement is normally more impactful than is distant exposure. 

We follow every MLB team with an index of their travels and game production within the "actual Air Density" the game was played.  We also reveal the actual Air Density Index (ADI) ahead of game time.  If you check the ADI ahead of game time, you will soon be able to know how much lift will be on the pitcher's 4-seamer, etc.

We have 5 years of data on pitchers and hitters for you to see why these issues make sense, and to prepare for today's pitcher.

The Visual Memory Index (VMI) gauges how familiar each hitter is (you or your team) with today's Air Resistance against the seams of the ball. 

We give you daily tips that will help you keep your focus on the right issues as you face today's pitchers.