Glossary

Value Hits

(VH%)
Year BIP H 1B 2B 3B HR AVG SLG BABIP wOBA
2015 10681 9226 810 3699 381 4336 .868 2.511 .771 1.397
2016 11083 9709 740 3706 355 4908 .882 2.619 .778 1.417
2017 10940 9689 680 3495 264 5250 .890 2.705 .780 1.436
All 32704 28624 2230 10900 1000 14494 .880 2.613 .776 1.417

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.


Poor Hits

(PH%)
Year BIP H 1B 2B 3B HR AVG SLG BABIP wOBA
2015 29660 413 344 56 9 4 .014 .017 .014 .013
2016 29611 377 299 68 8 2 .013 .016 .013 .012
2017 31539 377 307 59 5 6 .012 .015 .012 .011
All 90810 1167 950 183 22 12 .013 .016 .013 .012

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.


Ideally Hit

Year BIP H 1B 2B 3B HR AVG SLG BABIP wOBA
2015 8055 5343 59 1181 246 3857 .672 2.336 .354 1.228
2016 8899 6110 85 1281 255 4489 .698 2.440 .368 1.249
2017 8921 6283 68 1180 222 4813 .714 2.539 .358 1.277
All 25875 17736 212 3642 723 13159 .695 2.442 .360 1.252

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.


Well Struck

Year BIP H 1B 2B 3B HR AVG SLG BABIP wOBA
2015 17968 6669 285 1921 360 4103 .383 1.242 .185 .652
2016 18656 7505 359 2020 362 4764 .415 1.357 .197 .696
2017 18696 7787 323 1968 356 5143 .429 1.426 .195 .719
All 55320 21961 967 5909 1075 14010 .409 1.343 .193 .689

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.


scFIP

scFIP = 13 × x H R + 3 × B B - 2 × K I P + C

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

(DB%)
Year BIP H 1B 2B 3B HR AVG SLG BABIP wOBA
2015 37801 7210 6633 541 21 4 .192 .208 .192 .175
2016 36131 6726 6213 488 25 0 .187 .202 .187 .170
2017 34732 6273 5810 443 20 0 .181 .195 .181 .164
All 108664 20209 18656 1472 77 4 .187 .202 .187 .170

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 Plate Appearances (DB%).


Ground Balls

(GB%)
Year BIP H 1B 2B 3B HR AVG SLG BABIP wOBA
2015 18288 9574 8387 1117 70 0 .524 .592 .524 .487
2016 18157 9325 8242 1024 59 0 .514 .577 .514 .474
2017 18256 9259 8124 1064 71 0 .507 .573 .507 .468
All 54701 28158 24753 3205 200 0 .515 .581 .515 .476

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 Plate Appearances (GB%).


Low Drive

(LD%)
Year BIP H 1B 2B 3B HR AVG SLG BABIP wOBA
2015 16942 11764 7971 3312 336 145 .701 .964 .692 .710
2016 16935 11983 8252 3312 309 110 .714 .968 .706 .713
2017 17085 12031 8123 3506 238 164 .710 .974 .701 .710
All 50962 35778 24346 10130 883 419 .708 .968 .700 .711

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 Plate Appearances (LD%).


High Drive

(HD%)
Year BIP H 1B 2B 3B HR AVG SLG BABIP wOBA
2015 12062 6213 1923 2240 271 1779 .526 1.214 .431 .714
2016 12224 6644 2030 2363 254 1997 .554 1.293 .454 .748
2017 12294 6630 2029 2262 231 2108 .550 1.301 .444 .740
All 36580 19487 5982 6865 756 5884 .544 1.270 .443 .734

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 Plate Appearances (HD%).


Fly Ball

(FB%)
Year BIP H 1B 2B 3B HR AVG SLG BABIP wOBA
2015 16810 4865 1078 756 200 2831 .299 .893 .146 .480
2016 17093 5419 1108 787 193 3331 .328 1.003 .152 .524
2017 17419 5787 1116 821 201 3649 .342 1.062 .155 .547
All 51322 16071 3302 2364 594 9811 .323 .987 .151 .517

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 Plate Appearances (FB%).


Pop Up

(PU%)
Year BIP H 1B 2B 3B HR AVG SLG BABIP wOBA
2015 13566 567 289 133 12 133 .043 .084 .032 .053
2016 14503 637 306 165 15 151 .045 .090 .034 .055
2017 15720 677 349 152 17 159 .044 .087 .033 .053
All 43789 1881 944 450 44 443 .044 .087 .033 .054

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 Plate Appearances (PU%).