Air Density Report w/ @SyraCuseeee – 8.29.17


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

Mark Leiter- The weather for this game right now is sketchy so please look at it before deciding on pitching today.  The pitching on both sides of this game if the weather looks good interests me because of the 67.26 ADI but Leiter looks more interesting because of Atlanta’s struggles lately and their team VMI of -4.62

Edwin Jackson –Edwin is definitely interesting as of late.  Jackson has found the fountain of youth and has been better than expected and tonight’s game interests me.  The Marlins have a team VMI of -2.76 and the conditions in Washington are a little above average with a ADI of 66.56

Jaime Garcia – This is for sure a punt play but with limited pitchers in favorable VMI/ADI matchups Garcia is the only other option that stands out.  The Indians have a team VMI of -1.57 and the ADI for this game is 67.97 so the pitchers should do well.


Top Teams to use for hitting per ADI/VMI

  • Det vs Col – Its COORS!!!!!!!!!!! Both teams with over a +10.00 team VMI , but with the temps starting to drop in Colorado you need to consider fading this game


  • Minnesota Twins – I’m unsure about how chalky the Twins will be tonight facing Jaime Shields but their team VMI is the best on the slate not including the Coors game at +5.24. The ADI for this game is decent at 63.32 so I think this is a great option tonight if you want to fade Coors.


  • Texas Rangers – This is for sure an interesting play as far as ADI/VMI, the Rangers have a team VMI of +2.84 and face Fiers in Tropicana so I think the total might drop but with that being said the Rangers should hit Fiers very well according to their team VMI.