Harrison Barnes has the most career quarters in the first quarter, with 855 quarters.

Interpreted as:

most 20 point first quarters by a player all-time

	NAME	QTRS	PTS	GP	MPG	PPG	RPG	APG	SPG	BPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TPG	MIN	REB	AST	STL	BLK	TOV	PF	+/-
1	Harrison Barnes H. Barnes	855	3,555	855	7.4	4.2	1.3	0.5	0.2	0.0	1.6	3.2	48.0	0.5	1.3	40.6	0.5	0.7	80.4	59.0	0.3	1.1	0.3	6,313	1,138	464	156	36	235	252	-321
2	Kentavious Caldwell-Pope K. Caldwell-Pope	849	2,832	849	6.7	3.3	0.8	0.7	0.3	0.1	1.3	2.8	44.9	0.5	1.2	37.1	0.4	0.4	85.1	55.9	0.2	0.7	0.3	5,728	721	569	289	63	269	311	+137
3	DeMar DeRozan D. DeRozan	826	4,723	826	8.1	5.7	1.2	1.6	0.3	0.1	2.2	4.5	47.9	0.2	0.5	31.1	1.3	1.5	84.5	55.6	0.2	1.1	0.6	6,672	1,004	1,298	241	75	509	364	-320
4	Tobias Harris T. Harris	826	4,416	826	7.5	5.3	1.8	0.8	0.2	0.2	2.1	4.3	48.7	0.6	1.4	40.0	0.6	0.7	87.4	57.8	0.3	1.6	0.4	6,215	1,528	644	201	146	315	411	+614
5	Russell Westbrook R. Westbrook	819	4,393	819	6.8	5.4	2.1	2.5	0.4	0.1	2.0	4.5	45.2	0.3	0.9	34.4	1.0	1.3	74.0	52.8	0.4	1.7	1.1	5,576	1,710	2,042	340	62	906	425	+84
6	Dennis Schröder D. Schröder	808	2,686	808	6.0	3.3	0.7	1.3	0.2	0.0	1.3	3.0	43.0	0.3	0.9	32.4	0.4	0.5	81.2	51.1	0.1	0.6	0.6	4,862	601	1,030	165	36	475	353	-297
7	Nikola Vučević N. Vučević	808	4,512	808	7.4	5.6	3.2	1.0	0.3	0.2	2.5	4.8	51.8	0.3	0.9	38.5	0.3	0.4	78.6	56.5	0.7	2.5	0.5	6,016	2,560	809	217	150	374	323	-453
8	Rudy Gobert R. Gobert	803	2,746	803	7.1	3.4	3.4	0.5	0.2	0.5	1.4	2.1	65.4	0.0	0.0	0.0	0.6	1.0	65.5	66.9	0.9	2.5	0.4	5,672	2,720	365	132	410	330	416	+929
9	James Harden J. Harden	801	5,925	801	8.0	7.4	1.8	2.8	0.5	0.2	2.3	5.1	44.5	0.9	2.3	37.9	2.0	2.3	86.6	60.7	0.2	1.6	1.2	6,429	1,462	2,213	371	124	971	477	+768
10	Jonas Valančiūnas J. Valančiūnas	800	3,404	800	5.9	4.3	2.9	0.5	0.1	0.2	1.8	3.3	54.1	0.1	0.4	34.1	0.5	0.7	82.1	59.2	0.8	2.2	0.5	4,722	2,342	385	113	197	368	539	+44
11	Giannis Antetokounmpo G. Antetokounmpo	799	5,072	799	6.8	6.3	2.8	1.4	0.3	0.3	2.5	4.5	55.2	0.2	0.6	28.5	1.2	1.7	69.2	60.1	0.5	2.3	0.8	5,426	2,234	1,154	247	255	616	563	+994
12	Andrew Wiggins A. Wiggins	786	4,333	786	7.5	5.5	1.3	0.7	0.3	0.2	2.1	4.7	45.6	0.5	1.2	36.9	0.8	1.1	72.9	53.5	0.3	0.9	0.5	5,929	986	547	227	161	422	399	+195
13	Brook Lopez B. Lopez	775	3,481	775	6.5	4.5	1.6	0.4	0.2	0.5	1.8	3.7	48.6	0.5	1.4	38.2	0.4	0.5	80.1	57.8	0.4	1.1	0.4	5,032	1,209	327	129	426	274	428	+569
14	Andre Drummond A. Drummond	765	2,841	765	5.8	3.7	3.8	0.5	0.4	0.3	1.6	3.3	50.3	0.0	0.1	10.7	0.4	0.8	52.5	51.3	1.2	2.6	0.6	4,420	2,925	375	271	251	443	633	-135
15	Nikola Jokić N. Jokić	761	4,900	761	8.7	6.4	3.4	2.5	0.4	0.2	2.6	4.4	59.2	0.3	0.8	40.4	0.9	1.0	83.7	65.7	0.8	2.6	0.9	6,595	2,625	1,868	305	162	671	451	+1409
16	CJ McCollum	753	4,022	753	7.3	5.3	0.9	1.0	0.2	0.1	2.1	4.5	46.5	0.8	1.8	41.6	0.4	0.5	79.7	56.9	0.1	0.8	0.4	5,470	693	781	177	88	305	309	+281
17	Mason Plumlee M. Plumlee	749	1,706	749	4.7	2.3	2.0	0.8	0.2	0.2	1.0	1.7	58.1	0.0	0.0	0.0	0.4	0.6	59.2	59.3	0.6	1.4	0.4	3,539	1,474	583	157	166	298	475	-238
18	Chris Paul C. Paul	748	2,454	748	6.0	3.3	1.1	2.6	0.4	0.0	1.2	2.6	47.0	0.4	1.0	40.2	0.4	0.5	88.4	58.0	0.1	1.0	0.6	4,487	836	1,932	321	34	426	262	+934
19	Jordan Clarkson J. Clarkson	748	2,644	748	4.8	3.5	0.7	0.7	0.2	0.0	1.4	3.2	42.4	0.4	1.4	32.8	0.4	0.5	79.4	51.7	0.1	0.6	0.4	3,607	543	510	123	28	321	273	-371
20	Draymond Green D. Green	740	1,992	740	6.6	2.7	2.1	2.1	0.4	0.3	1.0	2.4	43.5	0.3	1.0	33.5	0.3	0.4	70.8	52.9	0.3	1.9	0.8	4,889	1,576	1,541	288	221	568	456	+343
21	Nicolas Batum N. Batum	737	1,878	737	5.8	2.5	1.4	1.1	0.3	0.1	0.9	2.2	42.2	0.4	1.1	35.6	0.3	0.4	84.1	54.0	0.2	1.1	0.4	4,260	1,030	796	211	93	303	212	+64
22	Damian Lillard D. Lillard	736	5,143	736	8.4	7.0	1.3	2.4	0.3	0.1	2.4	5.3	45.4	0.9	2.4	39.5	1.3	1.4	89.8	59.4	0.2	1.2	0.9	6,204	984	1,743	209	69	635	330	+667
23	Al Horford A. Horford	731	2,386	731	6.4	3.3	2.0	1.1	0.2	0.3	1.4	2.8	48.4	0.3	0.9	37.3	0.2	0.2	78.6	55.6	0.4	1.6	0.3	4,693	1,490	768	156	243	248	288	+1107
24	Buddy Hield B. Hield	728	2,885	728	7.4	4.0	1.1	0.8	0.2	0.1	1.5	3.4	44.2	0.8	1.9	40.2	0.2	0.2	84.5	56.6	0.2	1.0	0.4	5,353	815	562	165	56	315	323	-542
25	Julius Randle J. Randle	728	4,332	728	8.5	6.0	2.7	1.2	0.2	0.1	2.3	4.8	46.8	0.5	1.4	36.0	0.9	1.2	77.1	55.5	0.4	2.2	0.8	6,153	1,932	859	136	64	559	474	+87