Air Density Report w/ @Syracuseeee – 8.7.17


In this article I will break down the top teams and players that are affected the most by VMI and ADI today.  Many of you might ask what is VMI and ADI is so below I have written a brief description of what they mean and how they affect baseball games.

Air Density Report w/ Cuse

Visual Memory Index aka VMI in baseball is used to track how players perform under different air density’s. The easiest way to explain this is that depending on the weather temperature, humidity, or air density the batters swing will be affected.  You might ask yourself how is that possible?  Have you ever tried to swing a bat in the winter compared to a humid summer day?  It’s not the same and VMI tracks each batters muscle memory to various weather conditions.  A batter’s muscle memory takes time to adjust to certain weather conditions.  When taking VMI into effect I avoid teams or players with a number less than -5 which simply can be explained as they haven’t been hitting pitches with the type of movement that they will face on that day.  As far as what’s good for teams or players, I try and target +5 or greater because they will be used to pitches with high movement and their Visual memory will be good.

Air Density Index aka ADI is very simple to explain.  It’s a scale that goes 0-100 and is affected by three things (Elevation, temperature, and Humidity).  The Air Density is important in baseball because it will let you know how much movement the baseball will have in that ballpark on that day.  The higher the ADI the more movement on the pitch.  Typical 60 is the number people use to decide if the pitcher’s movement will be good or bad.  The lower an ADI is from 60 the less movement the pitchers ball will have and the higher it is from 60 will show the increase in the pitcher’s ball movement to the batter’s eye.


Todays Top Pitchers per VMI/ADI

Matt Moore-  Moore comes into today as one of the better looking on the slate regarding ADI/VMI.  The ADI in SF for today is 68.91 and the Cubs have a team VMI of -4.87 which is the worst on the slate.

Max Scherzer –The Marlins team VMI dropped almost a full 6 points for today’s game.  The Marlins bats will have a hard time adjusting and with the types of pitches Max throws he should mow them down.


Top Teams to use for hitting per ADI/VMI

  • Milwaukee Brewers- The Brewers get a huge bump in VMI today but keep in mind how awful they have been lately.  The Brewers will enter tonights game with a team VMI of +3.78 and that’s the best on the slate today.


  • Cardnials vs Royals– It should be very warm today in KC and when you look at the ADI (61.78) for this game there’s a good chance both teams can go off