This chart shows the wOBA value of batted balls grouped by horizontal and exit velocity. If you hover your mouse over the image, you will see the six batted ball classes I have identified, and if you click a group you will see the stats associated with batted balls in that class.

Dribble Balls

Year	BIP	H	1B	2B	3B	HR	AVG	SLG	BABIP	wOBA
All	134,733	16,634	15,591	1012	29	2	.127	.162	.123	.111
2015	35,628	4,465	4,179	279	5	2	.130	.164	.125	.114
2016	33,550	4,088	3,852	228	8	0	.126	.160	.122	.110
2017	34,146	4,321	4,023	292	6	0	.130	.166	.126	.114
2018	31,409	3,764	3,539	215	10	0	.127	.159	.120	.108

Dribble balls consist of weakly hit ground balls, and bloops that rarely leave the infield. They typically have low exit velocity and/or extremely low launch angles. These batted balls are reasonably prevalent, consisting of about 25% of all batted balls, but have limited value given their extremely low extra base hit rate and low batting average. This stat may be represented as a fraction of total Balls In Play (DB%).

Year	Avg Exit Velocity	Avg Angle	% of BIP
All	73.6	-19.3	26.3%
2015	75.1	-19.7	26.9%
2016	75.4	-20.6	25.7%
2017	72.5	-20.4	26.4%
2018	75.8	-20.7	24.6%

Ground Balls

Year	BIP	H	1B	2B	3B	HR	AVG	SLG	BABIP	wOBA
All	102,956	37,555	34,090	3,227	236	2	.365	.423	.365	.334
2015	27,171	10,080	9,188	829	61	2	.371	.428	.371	.340
2016	26,319	9,627	8,776	805	46	0	.366	.421	.366	.333
2017	24,423	9,050	8,226	767	57	0	.371	.428	.371	.338
2018	25,043	8,798	7,900	826	72	0	.351	.412	.351	.323

Ground Balls fall somewhere between Dribble Balls and Low Drives, both in terms of exit velocity and launch angle and in terms of value. These are a common class of batted ball, composing about 20% of all batted balls, and they are largely composed of sharply hit balls on the ground, but some of them may be softer hit bloops that just barely clear the infielder's reach. They rarely result in extra base hits, except when hit down the line and into the corner. This stat may be represented as a fraction of total Balls In Play (GB%).

Year	Avg Exit Velocity	Avg Angle	% of BIP
All	92.3	-0.7	19.8%
2015	92.4	-1.0	20.5%
2016	92.6	-0.9	20.2%
2017	91.8	-0.2	18.9%
2018	93.3	-1.0	19.3%

Low Drives

Year	BIP	H	1B	2B	3B	HR	AVG	SLG	BABIP	wOBA
All	86,785	65,990	52,918	11,983	1,075	14	.763	.931	.760	.728
2015	22,160	16,765	13,349	3,121	291	4	.760	.932	.756	.729
2016	21,845	16,562	13,350	2,923	288	1	.761	.926	.758	.724
2017	21,547	16,441	13,119	3,085	232	5	.766	.935	.763	.728
2018	21,233	16,222	13,100	2,854	264	4	.766	.930	.764	.731

Low Drives have very high success rates and overall value, but are largely composed of singles as opposed to extra base hits. Low Drives can have low exit velocity and higher launch angle, or a higher exit velocity and a lower launch angle. Just about 17% of batted balls fall into this class, but this number may not be stable or predictive for any given batter. In essence, this is a class of batted ball that embodies the "BABIP is luck" aspect of DIPS theory. Batters with high or low LD% will likely regress towards the mean. This stat may be represented as a fraction of total Balls In Play (LD%).

Year	Avg Exit Velocity	Avg Angle	% of BIP
All	94.0	12.8	16.7%
2015	94.0	12.9	16.7%
2016	94.0	12.9	16.7%
2017	93.9	12.9	16.7%
2018	94.8	12.7	16.5%

High Drives

Year	BIP	H	1B	2B	3B	HR	AVG	SLG	BABIP	wOBA
All	51,770	34,948	1,501	11,761	1,421	20,265	.685	2.164	.284	1.142
2015	11901	7958	309	2758	395	4496	.677	2.128	.291	1.147
2016	13016	8934	382	3052	372	5128	.697	2.194	.292	1.156
2017	13078	9162	392	2901	322	5547	.710	2.276	.276	1.178
2018	13,775	8,894	418	3,050	332	5,094	.656	2.059	.276	1.092

High Drives are the highest quality batted balls. They only represent about 10% of batted balls, but 90% home runs and 34% of doubles. High Drives should be seen as a measure of power, and give good insight on the raw skill of a batter. The number of High Drives is largely driven by exit velocity, but it is constrained by the launch angles most likely to produce high value batted balls. Increases of batted balls in this class represent either an increase in these ideal launch angles, an increase in exit velocity, or both. This stat may be represented as a fraction of total Balls In Play (HD%).

Year	Avg Exit Velocity	Avg Angle	% of BIP
All	102.5	24.7	9.8%
2015	102.2	24.7	9.0%
2016	102.5	24.8	10.0%
2017	102.5	24.8	10.1%
2018	103.3	24.9	11.6%

Fly Balls

Year	BIP	H	1B	2B	3B	HR	AVG	SLG	BABIP	wOBA
All	53,204	12,620	5,273	4,578	600	2,169	.245	.487	.196	.294
2015	13,345	2,944	1,168	1,133	166	477	.229	.456	.185	.277
2016	13,157	3,132	1,340	1,120	145	527	.246	.484	.198	.293
2017	13,289	3,264	1,298	1,186	147	633	.254	.520	.198	.307
2018	13,413	3,280	1,467	1,139	142	532	.253	.489	.205	.299

Fly Balls represent batted balls that are close to having high value, but don't quite hit the mark, either due to exit velocity being a tough too low or launch angle being a touch too high. When pulled down the lines, these batted balls can supply solid value, but when hit towards the middle third of the field they will often turn into easy outs. About 10% of batted balls fall into this class. This stat may be represented as a fraction of total Balls In Play (FB%).

Year	Avg Exit Velocity	Avg Angle	% of BIP
All	88.9	29.4	10.1%
2015	88.9	29.0	10.1%
2016	88.9	29.2	10.1%
2017	88.9	29.4	10.3%
2018	89.3	29.9	10.2%

Pop Ups

Year	BIP	H	1B	2B	3B	HR	AVG	SLG	BABIP	wOBA
All	90,712	1,997	790	990	126	91	.023	.042	.021	.025
2015	22,118	457	188	222	27	20	.021	.039	.020	.024
2016	22,678	459	184	225	24	26	.021	.039	.019	.023
2017	22,901	540	200	273	43	24	.024	.047	.023	.027
2018	23,015	541	218	270	32	21	.024	.044	.023	.027

Pop Ups represent the weakest class of batted balls. These are balls that either lack the exit velocity to enter the High Drive section, and thus fall into the "dead zone", or they have launch angles that exceed the acceptable range for batted balls. About 17% of batted balls fall into this class. This stat may be represented as a fraction of total Balls In Play (PU%).

Year	Avg Exit Velocity	Avg Angle	% of BIP
All	84.6	46.2	17.3%
2015	83.8	49.6	16.7%
2016	83.9	50.4	17.4%
2017	84.0	50.2	17.7%
2018	84.1	50.6	17.8%