Lauri Markkanen has the worst career defensive rating by a big man, with a 114.2 rating.

Interpreted as:

highest defensive rating with a minimum of 10000 minutes played frontcourt

	NAME	DRTG	MIN	GP	MPG	PPG	RPG	APG	SPG	BPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TPG	PTS	REB	AST	STL	BLK	TOV	PF	+/-
1	Lauri Markkanen L. Markkanen	114.2	13,956	450	31.0	18.2	7.1	1.5	0.7	0.5	6.3	13.8	45.5	2.5	6.8	37.1	3.1	3.6	86.7	59.2	1.4	5.7	1.4	8,200	3,201	657	315	222	626	842	-530
2	Dorian Finney-Smith D. Finney-Smith	114.0	14,427	489	29.5	9.1	4.9	1.6	0.9	0.5	3.3	7.5	44.4	1.7	4.7	37.0	0.7	1.0	71.3	57.3	1.6	3.2	0.9	4,436	2,375	758	423	236	448	1,115	+822
3	John Collins J. Collins	113.9	13,730	472	29.1	16.0	8.1	1.5	0.6	1.0	6.2	11.4	54.6	1.0	2.9	36.3	2.5	3.2	79.2	62.5	2.2	5.8	1.5	7,553	3,805	697	288	479	724	1,436	-583
4	P.J. Washington	113.9	11,917	390	30.6	13.1	5.9	2.3	1.0	1.0	4.9	10.9	44.8	1.7	4.9	35.8	1.6	2.3	70.9	55.1	1.2	4.6	1.6	5,121	2,282	878	378	382	627	974	-501
5	Kyle Kuzma K. Kuzma	113.4	16,855	541	31.2	17.0	6.3	2.7	0.6	0.5	6.5	14.4	45.0	1.9	5.8	33.4	2.1	3.0	72.1	54.2	1.0	5.3	2.2	9,210	3,413	1,446	304	281	1,174	1,122	-1254
6	Jerami Grant J. Grant	112.8	18,522	639	29.0	14.1	4.1	1.7	0.7	1.0	4.8	10.7	44.8	1.4	3.9	36.3	3.1	4.1	76.1	56.4	0.9	3.2	1.4	8,991	2,621	1,104	452	669	870	1,492	-1357
7	Aaron Gordon A. Gordon	112.4	18,415	595	30.9	14.8	6.4	3.0	0.7	0.6	5.6	11.5	48.6	1.2	3.5	33.5	2.4	3.5	69.4	56.7	1.8	4.6	1.6	8,795	3,798	1,778	442	368	964	1,170	+1410
8	Terry Catledge T. Catledge	111.7	10,300	373	27.6	13.4	6.7	1.0	0.6	0.2	5.3	10.8	48.5	0.0	0.1	12.5	2.9	4.3	66.7	52.6	3.0	3.6	1.8	5,001	2,482	382	211	77	672	963
9	Trey Lyles T. Lyles	111.6	11,973	650	18.4	7.6	4.3	1.1	0.4	0.4	2.7	6.2	44.1	1.0	2.9	34.7	1.1	1.5	74.1	55.3	0.9	3.4	0.8	4,935	2,826	697	260	229	517	918	-192
10	Pascal Siakam P. Siakam	111.4	19,637	629	31.2	18.0	6.7	3.6	0.9	0.6	6.9	13.8	49.9	1.1	3.2	33.9	3.1	4.1	76.3	57.7	1.5	5.1	1.8	11,325	4,183	2,261	569	374	1,132	1,695	+2169
11	Jerome Whitehead J. Whitehead	111.1	11,828	679	17.4	6.5	4.8	0.6	0.4	0.3	2.7	5.4	49.7	0.0	0.0	0.0	1.2	1.6	71.8	53.5	1.7	3.1	1.0	4,423	3,268	374	251	200	696	1,833
12	Jeff Green J. Green	111.1	21,958	828	26.5	11.4	3.9	1.4	0.6	0.5	4.1	8.8	46.8	1.0	2.9	34.7	2.2	2.7	81.0	57.2	0.8	3.1	1.2	9,448	3,249	1,174	508	408	983	1,710	-498
13	Dario Šarić D. Šarić	111.0	11,080	493	22.5	10.4	5.3	1.9	0.6	0.2	3.7	8.3	44.4	1.3	3.6	36.0	1.7	2.0	83.7	56.2	1.4	4.0	1.5	5,113	2,626	940	278	97	721	985	+21
14	Jeff Turner J. Turner	110.8	11,244	612	18.4	6.0	3.3	1.0	0.4	0.1	2.5	5.4	46.7	0.1	0.3	34.4	0.9	1.1	76.9	51.2	1.0	2.3	1.1	3,697	2,036	635	215	85	687	1,758
15	Julius Randle J. Randle	110.8	22,738	710	32.0	19.0	9.1	3.8	0.7	0.4	6.9	14.6	47.1	1.2	3.6	33.4	4.0	5.4	75.3	56.0	2.0	7.2	2.8	13,517	6,492	2,710	486	284	1,994	2,152	-943
16	Andrea Bargnani A. Bargnani	110.8	15,806	550	28.7	14.3	4.6	1.2	0.4	0.9	5.3	12.1	43.9	1.1	3.2	35.4	2.5	3.0	82.4	53.1	1.0	3.7	1.5	7,873	2,541	653	207	470	851	1,338	-1284
17	Sam Mitchell S. Mitchell	110.8	10,898	474	23.0	8.9	4.2	1.1	0.5	0.4	3.3	7.6	44.0	0.0	0.2	17.4	2.2	2.9	77.8	50.5	1.5	2.7	0.9	4,224	1,975	502	253	173	424	1,307	+35
18	Carmelo Anthony C. Anthony	110.7	11,557	349	33.1	20.4	6.1	2.0	0.8	0.6	7.3	16.8	43.5	2.0	5.3	38.5	3.7	4.5	83.6	54.3	1.3	4.8	1.8	7,112	2,117	705	289	197	633	941	+684
19	Tobias Harris T. Harris	110.5	22,844	706	32.4	16.3	6.4	2.5	0.8	0.6	6.2	12.9	48.0	1.4	3.7	37.0	2.5	2.9	84.5	57.2	1.0	5.4	1.4	11,500	4,527	1,778	574	417	998	1,449	+723
20	Larry Nance Jr. L. Nance Jr.	110.4	12,587	546	23.1	7.7	6.1	1.9	1.1	0.5	3.2	5.9	53.9	0.4	1.2	35.3	0.9	1.3	69.6	59.6	1.8	4.3	0.9	4,204	3,341	1,017	621	268	504	1,152	-731
21	Wendell Carter Jr. W. Carter Jr.	110.4	10,446	383	27.3	11.9	8.3	2.0	0.6	0.7	4.5	8.8	50.9	0.7	2.3	31.6	2.2	3.0	72.9	58.6	2.3	6.0	1.5	4,565	3,173	765	247	281	583	1,108	-700
22	Domantas Sabonis D. Sabonis	110.3	19,896	646	30.8	16.1	10.7	4.9	0.8	0.5	6.3	11.2	56.0	0.5	1.4	34.7	3.0	4.1	72.9	61.6	2.7	7.9	2.6	10,401	6,880	3,161	495	297	1,662	2,018	+723
23	Deandre Ayton D. Ayton	110.3	12,271	398	30.8	16.4	10.5	1.6	0.7	1.0	7.3	12.4	59.0	0.1	0.3	23.0	1.8	2.3	75.5	61.3	3.1	7.4	1.7	6,542	4,167	649	292	380	688	1,051	-154
24	Bobby Portis B. Portis	110.3	14,905	654	22.8	12.0	7.2	1.3	0.6	0.4	4.8	10.1	47.8	1.1	2.9	38.3	1.1	1.5	76.5	55.4	1.9	5.3	1.1	7,818	4,685	850	395	247	716	1,266	-92
25	Marcus Morris Sr. M. Morris Sr.	110.2	15,500	608	25.5	11.5	4.4	1.4	0.6	0.3	4.3	9.8	43.3	1.6	4.2	37.4	1.4	1.8	77.3	54.1	0.8	3.6	1.0	7,005	2,656	860	359	167	610	1,251	-300