Historical Team OPS Differentials, 1901-2019

Retrosheet has added data going back to 1901 now for certain splits and they can be accessed from Baseball Reference's "Stathead" database.

Historical Team OPS Differentials, 1901-1919

The table below has the top 30

Rank	Team	Year	HOPS	POPS	Diff	W-L%
1	NYY	1927	0.873	0.672	0.201	0.714
2	HOU	2019	0.848	0.681	0.167	0.660
3	NYG	1905	0.718	0.558	0.160	0.686
4	NYY	1939	0.825	0.665	0.160	0.702
5	PHA	1913	0.732	0.578	0.154	0.627
6	LAD	2019	0.810	0.661	0.149	0.654
7	CHC	1906	0.671	0.528	0.143	0.762
8	NYG	1911	0.748	0.608	0.140	0.647
9	STL	1944	0.745	0.606	0.139	0.682
10	CHC	2016	0.772	0.633	0.139	0.640
11	ATL	1998	0.795	0.657	0.138	0.654
12	BAL	1969	0.756	0.620	0.136	0.673
13	BOS	1912	0.735	0.600	0.135	0.691
14	NYY	1936	0.865	0.732	0.133	0.667
15	STL	1942	0.717	0.586	0.131	0.688
16	PIT	1909	0.683	0.553	0.130	0.724
17	CHC	1910	0.711	0.583	0.128	0.675
18	PHA	1910	0.684	0.556	0.128	0.680
19	NYG	1912	0.754	0.626	0.128	0.682
20	PHA	1929	0.816	0.688	0.128	0.693
21	CLE	1948	0.792	0.665	0.127	0.626
22	NYY	1998	0.825	0.699	0.126	0.704
23	SEA	2001	0.805	0.679	0.126	0.716
24	NYY	1921	0.839	0.714	0.125	0.641
25	PHA	1909	0.664	0.540	0.124	0.621
26	NYG	1913	0.699	0.576	0.123	0.664
27	SLB	1922	0.823	0.700	0.123	0.604
28	DET	1915	0.716	0.594	0.122	0.649
29	NYY	1937	0.825	0.703	0.122	0.662
30	CLE	1995	0.839	0.718	0.121	0.694