Who was the last rookie with 6 triple-doubles in a season?

Luka Doncic had 23p/11r/10a in Saturday's blowout of the Warriors. It was his sixth triple-double of the season; only Ben Simmons, Magic Johnson and Oscar Robertson have posted more in their rookie season.

Interpreted as:
Who was the last rookie with 6 or more triple-doubles in a season?
NAME SEASON TM GP TD3 MPG PPG RPG APG SPG BPG 3PM FG% FT% TPG FGM FGA 3PA 3P% FTM FTA PF MIN PTS REB AST STL BLK TOV
1 Luka Doncic
Luka Doncic
2018-19
DAL DAL
68
6
32.2
21.0
7.6
5.8
1.1
0.4
2.4
42.6
70.5
3.4
7.0
16.4
7.1
33.3
4.7
6.7
1.9
2,187
1,431
515
393
74
24
229
2 Ben Simmons
Ben Simmons
2017-18
PHI PHI
81
12
33.7
15.8
8.1
8.2
1.7
0.9
0.0
54.5
56.0
3.4
6.7
12.3
0.1
0.0
2.4
4.2
2.6
2,732
1,279
659
661
140
70
278
3 Magic Johnson
Magic Johnson
1979-80
LAL LAL
77
7
36.3
18.0
7.7
7.3
2.4
0.5
0.1
53.0
81.0
4.0
6.5
12.3
0.4
22.6
4.9
6.0
2.8
2,795
1,387
596
563
187
41
305
4 Oscar Robertson
Oscar Robertson
1960-61
CIN CIN
71
26
42.7
30.5
10.1
9.7
47.3
82.2
10.6
22.5
9.2
11.2
3.1
3,032
2,165
716
690
StatMuse has season-level data for triple-doubles going back to the 1950-51 season.

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Western W L PCT GB
1
Thunder Thunder
68
14
.829
2
Rockets Rockets
52
30
.634
16.0
3
Lakers Lakers
50
32
.610
18.0
4
Nuggets Nuggets
50
32
.610
18.0
5
Clippers Clippers
50
32
.610
18.0
6
Timberwolves Timberwolves
49
33
.598
19.0
Eastern W L PCT GB
1
Cavaliers Cavaliers
64
18
.780
2
Celtics Celtics
61
21
.744
3.0
3
Knicks Knicks
51
31
.622
13.0
4
Pacers Pacers
50
32
.610
14.0
5
Bucks Bucks
48
34
.585
16.0
6
Pistons Pistons
44
38
.537
20.0