Kevin Durant has the most career points per game by a player older than 31, with 28.2 per game.

Interpreted as:

most points by a player averaged by a > 31 year old

NAME	PPG	GP	MPG	RPG	APG	SPG	BPG	TPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	MIN	PTS	REB	AST	STL	BLK	TOV	PF	+/-
Kevin Durant	28.2	212	36.2	6.9	5.5	0.8	1.2	3.3	10.1	18.9	53.2	2.2	5.3	40.9	5.9	6.6	89.1	7,666	5,984	1,462	1,159	175	255	710	415	+1096
Stephen Curry	28.2	257	34.0	5.3	5.8	1.0	0.3	3.1	9.3	20.1	46.5	4.9	11.9	40.8	4.6	5.1	91.9	8,725	7,249	1,351	1,498	268	79	808	483	+1206
Damian Lillard	27.8	131	35.8	4.6	7.1	0.9	0.3	2.9	8.4	18.9	44.3	3.5	9.8	36.3	7.5	8.2	91.7	4,685	3,641	597	933	122	36	384	243	+496
Kyrie Irving	27.5	10	37.8	4.4	4.7	1.3	0.6	2.4	10.0	18.9	52.9	3.4	7.8	43.6	4.1	4.6	89.1	378	275	44	47	13	6	24	23	+127
LeBron James	27.1	477	35.8	8.2	8.3	1.2	0.7	3.7	10.2	19.6	52.3	2.1	5.9	35.8	4.5	6.3	71.7	17,080	12,930	3,897	3,952	579	321	1,785	793	+1453
Michael Jordan	26.5	405	37.5	6.1	4.2	1.7	0.5	2.3	10.2	22.0	46.3	0.7	2.0	35.7	5.5	6.8	81.2	15,169	10,751	2,453	1,698	699	209	918	839	+1438
DeMar DeRozan	25.5	229	36.7	4.7	5.1	1.1	0.5	2.0	9.1	18.3	49.6	0.7	2.2	33.6	6.5	7.5	86.7	8,413	5,831	1,075	1,172	241	105	469	525	+81
Elgin Baylor	24.9	288							9.6						5.7	7.4	77.9		7,169
Jerry West	24.6	246							9.2						6.3	7.6	82.1		6,048
Kobe Bryant	24.2	325	34.7	5.0	4.7	1.2	0.2	3.2	8.5	19.9	42.5	1.6	5.3	30.5	5.6	6.8	83.3	11,271	7,853	1,637	1,540	390	76	1,025	639	-200
Karl Malone	23.8	660	36.6	9.2	4.2	1.4	0.7	2.9	8.6	17.1	50.3	0.1	0.2	30.1	6.5	8.5	77.0	24,164	15,691	6,039	2,778	919	445	1,892	1,827	+3010
Kawhi Leonard	23.7	68	34.3	6.1	3.6	1.6	0.9	1.8	9.0	17.1	52.5	2.1	4.9	41.7	3.7	4.2	88.5	2,330	1,613	416	244	111	59	119	97	+392
Paul George	23.1	130	34.2	5.6	4.2	1.5	0.4	2.5	8.0	17.2	46.5	3.1	7.8	39.5	4.0	4.5	88.9	4,441	3,003	730	550	196	57	329	361	+618
Paul Arizin	22.5	157							8.0						6.5	7.9	81.8		3,536						642
Alex English	22.5	451	32.4	4.1	3.8	0.8	0.3	2.1	9.4	19.2	49.1	0.0	0.1	22.2	3.6	4.2	85.4	14,616	10,140	1,832	1,699	344	119	927	994
Bob Pettit	21.8	30		12.2	2.5				7.6	18.4	41.2				6.6	7.8	84.7		653	367	74				100
Jimmy Butler	21.7	181	33.8	5.7	5.2	1.6	0.4	1.8	7.0	13.9	50.7	0.7	2.0	33.8	7.0	8.1	85.9	6,111	3,931	1,029	950	290	65	324	236	+507
Bernard King	21.6	246	31.2	4.5	3.8	0.7	0.2	2.9	8.5	17.6	47.9	0.1	0.4	18.1	4.6	5.8	79.5	7,674	5,320	1,119	932	174	37	721	651
Larry Bird	21.6	180	38.2	9.2	7.2	1.4	0.8	3.1	8.5	18.3	46.6	1.1	2.9	37.2	3.5	3.8	91.9	6,883	3,892	1,655	1,299	256	152	555	373
Dominique Wilkins	21.5	320	31.8	5.9	2.3	0.9	0.3	2.2	7.7	17.5	43.9	1.3	3.7	33.9	4.9	6.0	81.8	10,172	6,893	1,900	736	274	110	714	503	-392
Allen Iverson	21.2	167	38.2	3.0	5.9	1.6	0.1	2.7	7.2	16.2	44.2	0.8	2.4	33.1	6.1	7.6	80.0	6,381	3,544	495	982	267	20	455	243	+272
Sam Jones	20.8	282							8.4						3.9	4.8	81.9		5,864
Kareem Abdul-Jabbar	20.6	787	32.6	7.6	2.8				8.5	14.9	57.2	0.0	0.0	5.9	3.6	4.9	74.3	25,676	16,246	5,981	2,220				2,258
Julius Erving	20.2	389	33.3	5.8	3.5		1.5		7.9	15.8	50.0	0.1	0.3	28.5	4.2	5.5	77.1	12,966	7,849	2,274	1,362		597		1,030
Klay Thompson	20.1	166	31.4	3.8	2.4	0.6	0.5	1.6	7.3	16.8	43.4	3.9	9.8	39.8	1.6	1.8	89.6	5,217	3,336	625	391	107	75	264	294	+164