Astros home/road hitting splits 2017-2019.

It's now generally assumed that the Houston Astros "cheated" at home in the 2017, 2018, 2019 seasons: using electronic means to get the opposing catcher's signs to the opposing pitcher and communicating that to the Astro who was batting. The electronic part is what's against the rules.

This post looks at the Astros hitting splits, home and road. If the cheating was done at home, Astros hitting should be better at home. And/or Astros hitters were selected because they might do well in the home park. And/or Astros hitters like home cooking.

First team splits, then splits for key individuals.

2017:

Split	G	GS	PA	AB	R	H	2B	3B	HR	RBI	SB	CS	BB	SO	BA	OBP	SLG	OPS	TB	GDP	HBP	SH	SF	IBB	ROE	BAbip	tOPS+	sOPS+
Home	799	81	3009	2701	395	754	165	6	115	382	55	22	231	502	.279	.340	.472	.812	1276	72	32	8	31	12	30	.302	97	110
Away	878	81	3262	2910	501	827	181	14	123	472	43	20	278	585	.284	.351	.483	.834	1405	67	38	3	30	15	32	.315	103	127

2018:

Split	G	GS	PA	AB	R	H	2B	3B	HR	RBI	SB	CS	BB	SO	BA	OBP	SLG	OPS	TB	GDP	HBP	SH	SF	IBB	ROE	BAbip	tOPS+	sOPS+
Home	856	81	2981	2620	373	649	122	4	92	355	39	11	294	573	.248	.328	.403	.730	1055	73	28	11	22	9	23	.282	95	99
Away	863	81	3165	2833	424	741	156	14	113	408	32	15	271	624	.262	.331	.446	.777	1264	83	33	3	23	10	28	.296	106	116

2019:

Split	G	GS	PA	AB	R	H	2B	3B	HR	RBI	SB	CS	BB	SO	BA	OBP	SLG	OPS	TB	GDP	HBP	SH	SF	IBB	ROE	BAbip	tOPS+	sOPS+
Home	824	81	3124	2735	489	776	160	13	150	473	27	11	318	579	.284	.362	.516	.878	1412	63	34	6	28	8	22	.308	107	128
Away	880	81	3270	2878	431	762	163	15	138	418	40	16	327	587	.265	.343	.476	.819	1369	82	32	4	29	9	24	.286	94	119

Summary:

	home	road	h-r	h-r		home	road	h-r	h-r		home	road		home	road
year	OPS	OPS	OPS	%dif	year	AB/HR	AB/HR	AB/HR	%dif	year	AB	AB	year	HR	HR
2017	.812	.834	-.022	-2.64%	2017	23.49	23.66	-.172	-0.73%	2017	2,701	2,910	2017	115	123
2018	.730	.777	-.047	-6.05%	2018	28.48	25.07	3.407	13.59%	2018	2,620	2,833	2018	92	113
2019	.878	.819	.059	7.20%	2019	18.23	20.86	-2.622	-12.57%	2019	2,735	2,878	2019	150	138

Road was used as base.

OPS: better at home in 2019

AB/HR: better at home in 2017 and 2019 (lower is better)

Both have the most significant home advantage in 2019:
OPS 7.20%
AB/HR 12.57%

Altuve	home	road	h-r	h-r	Astros
year	OPS	OPS	OPS	%dif	%dif
2017	.834	1.081	-.247	-22.85%	-2.64%
2018	.776	.898	-.122	-13.59%	-6.05%
2019	.979	.836	.143	17.11%	7.20%
Correa	home	road	h-r	h-r	Astros
year	OPS	OPS	OPS	%dif	%dif
2017	.986	.905	.081	8.95%	-2.64%
2018	.638	.818	-.180	-22.00%	-6.05%
2019	1.034	.838	.196	23.39%	7.20%
Bregman	home	road	h-r	h-r	Astros
year	OPS	OPS	OPS	%dif	%dif
2017	.787	.863	-.076	-8.81%	-2.64%
2018	.969	.884	.085	9.62%	-6.05%
2019	.923	1.109	-.186	-16.77%	7.20%
Springer	home	road	h-r	h-r	Astros
year	OPS	OPS	OPS	%dif	%dif
2017	.875	.902	-.027	-2.99%	-2.64%
2018	.805	.753	.052	6.91%	-6.05%
2019	.932	1.012	-.080	-7.91%	7.20%
Gurriel	home	road	h-r	h-r	Astros
year	OPS	OPS	OPS	%dif	%dif
2017	.793	.840	-.047	-5.60%	-2.64%
2018	.802	.699	.103	14.74%	-6.05%
2019	.966	.815	.151	18.53%	7.20%
%dif
year	Altuve	Correa	Bregman	Springer	Gurriel
2017	-22.85%	8.95%	-8.81%	-2.99%	-5.60%
2018	-13.59%	-22.00%	9.62%	6.91%	14.74%
2019	17.11%	23.39%	-16.77%	-7.91%	18.53%

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