[Mick]

Who was the first NBA player to have a documented quadruple-double?

Wilt

I just found out that the reason the quadruple doubles started in 1974 is because blocks and steals weren't officially a recorded statistic until that season.

Along those lines, supposedly Wilt Chamberlain had 53 points, 34 rebounds, and 14 assists (all documented) and 24 blocks and 11 steals (undocumented).  Wouldn't surprise me that it actually happened.

Open Court - On March 18, 1968 Wilt Chamberlain allegedly dropped an unofficial (blocks and steals weren't recorded until the 1973–74 season) quintuple double with 53 points, 32 rebounds, 14 assists, 24 blocks, and 11 steals. Harvey Pollack, Philadelphia's Director of Statistical Information, recorded the blocks and steals back then. | Facebook

Lakers vs 76ers, March 18, 1968 | Basketball-Reference.com

Did Wilt Chamberlain have a quintuple double? – Gaming Section : Magazine Gaming, E-sport, jeux vidéo, Reviews, Trucs & Astuces

Supposedly, Wilt had three quadruple doubles in the 1960s, and actually according to this account, Bill Russell had the first quadruple double way back in 1961:
https://nbahoopsonline.com/History/Recor...ouble.html

[Mick]

Who was the first NBA player to have a documented quadruple-double?

Wilt

I just found out that the reason the quadruple doubles started in 1974 is because blocks and steals weren't officially a recorded statistic until that season.

Along those lines, supposedly Wilt Chamberlain had 53 points, 34 rebounds, and 14 assists (all documented) and 24 blocks and 11 steals (undocumented).  Wouldn't surprise me that it actually happened.

Open Court - On March 18, 1968 Wilt Chamberlain allegedly dropped an unofficial (blocks and steals weren't recorded until the 1973–74 season) quintuple double with 53 points, 32 rebounds, 14 assists, 24 blocks, and 11 steals. Harvey Pollack, Philadelphia's Director of Statistical Information, recorded the blocks and steals back then. | Facebook

Lakers vs 76ers, March 18, 1968 | Basketball-Reference.com

Did Wilt Chamberlain have a quintuple double? – Gaming Section : Magazine Gaming, E-sport, jeux vidéo, Reviews, Trucs & Astuces

Supposedly, Wilt had three quadruple doubles in the 1960s, and actually according to this account, Bill Russell had the first quadruple double way back in 1961:
https://nbahoopsonline.com/History/Recor...ouble.html