You will see this stat thrown around quite liberally when talking about xStats, this is a unique measure which aims to count the number of extremely high quality pieces of contact produced by a batter or surrendered by a pitcher. As you can see in the stats above, Value Hits are the highest quality batted balls in the game. They register as extra base hits 81% of the time, and account for 85% of all home runs, 43% of doubles, and 37% of triples. On the main stats sheets you will see the stat expressed as VH%, which measures Value Hits per Plate Appearance.
This is the opposite of Value Hits, and aims to measure the absolute worst contact in baseball. Poorly Hit balls are near automatic outs, with an on base percentage of .018. Even on the rare occasions when these balls become hits, they are kept to singles 85% of the time. On the main stats sheets you will see the stat expressed as PH%, which measures Poor Hits per Plate Appearance.
While not as commonly cited as Value Hits, Ideally Hit Balls- also referred to as Ideal Hits, or Ideal Contact- will be referenced occasionally. These batted balls have a vertical angle between 21 and 36 degrees and an exit velocity of at least 96 mph. This stat is not tracked on the primary stats sheet, but there is a separate link to an Ideally Hit Balls Sheet which contains many different stats you may find useful.
This is the little brother of Ideally Hit. Where Ideally Hit Measures batted balls with an exit velocity of at least 96 mph, Well Struck measures those with at least 80 mph. Otherwise, they both measure balls with a vertical launch angle between 21 and 36 degrees. This stat is occasionally referenced, but isn't explicitly tracked on any sheet or source.
Statcast Fielding Independent Pitching, scFIP, uses the expected home run rate generated by xStats to estimate a pitcher's ERA assuming league average results on his batted balls, taking into account launch angle and exit velocity. Launch angle and exit velocity can predict with reasonable certainty whether a ball will go over a wall, but other factors, such as wind and air density, can sometimes play a significant role in the final outcome. scFIP gives a pitcher credit for his ability to control quality of contact, but grants him the assumption of average results on that contact. Over time, if the same type of contact is surrendered, you'd expect the home run rate, and thus his FIP, to approach his scFIP.
Dribble balls have a vertical launch angle below 0 degrees. They can have any horizontal angle or exit velocity. This stat may be represented as a fraction of total Balls In Play (DB%).
Ground Balls have a vertical launch angle between 0 and 10 degrees. They can have any horizontal angle or exit velocity. This stat may be represented as a fraction of total Balls In Play (GB%).
Low Drives have a vertical launch angle between 10 and 19 degrees. They can have any horizontal angle or exit velocity. This stat may be represented as a fraction of total Balls In Play (LD%).
High Drives have a vertical launch angle between 19 and 26 degrees. They can have any horizontal angle or exit velocity. This stat may be represented as a fraction of total Balls In Play (HD%).
Fly Balls have a vertical launch angle between 26 and 39 degrees. They can have any horizontal angle or exit velocity. This stat may be represented as a fraction of total Balls In Play (FB%).
Pop Ups have a vertical launch angle above 39 degrees. They can have any horizontal angle or exit velocity. This stat may be represented as a fraction of total Balls In Play (PU%).