Moses Malone - 51 in the 1978-1979 season (the original answer and official record holder until today 3/9/11 when Kevin Love Registered his 52nd consecutive double double)
However...
"Elvin Hayes registered 60 straight from October 30, 1968 to February 22, 1969." as a rookie. http://www.nba.com/bobcats/okafor_double_041220.html The article is speaking of Emeka Okafor's 19 straight double doubles as a rookie, the longest rookie streak since the above mentioned Elvin Hayes. The quote is from the NBA.com article.
The "modern era" record looks like this PlayerSeasonNumber of double-doublesElvin Hayes'73-7455Kareem Abdul-Jabbar'72-7351Moses Malone'78-7951Kevin Love'10-1152
Unofficially, Wilt Chamberlin holds the all-time record for consecutive double-doubles at 227.
As of March 2, 2011 http://www.nba.com/2011/news/features/steve_aschburner/03/01/k-love/index.html
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Moses Malone had the record with 50 i believe in the 76-77 season and it was just broken by Kevin Love yesterday. it is now 51 by Kevin Love and he is still going
Wilt Chamberlain has the most career rebounds in NBA history with 23,924 rebounds.
45
Dennis Rodman
The Vancover Grizzles lost 23 in a row in the 1996 NBA season. The worst start in NBA history goes to the 2009 New Jersey Nets who started off 0-17. The worst record in NBA history goes to the 1972-73 Philadelphia 76ers who finished 9-73. In the 2010-2011 season, the new record goes to the Cleveland Cavaliers with 25 consecutive losses in a row. ( 8-40) The most consecutive losses in NBA history.
Actually and in the history is Yao Ming