12 games
80 of 81 - For the Chicago Blackhawks in a losing effort against their original 6 rival - the Boston Bruins.
18 games in 1982
9 as of 8/5/12
towson university
Cleveland cavaliers 26
Make that 18 seasons (1992 - 2010) and counting.
The Chicago Cubs 2008 longest losing streak was 6 games between August 30 and September 6.
September 1, 1967 the Cincinnati Reds played the longest game in club history, losing to the San Francisco Giants 1-0 in 21 innings.
the 1961 Philadelphia Phillies, losing 23 straight from July 29th through the first game of a doubleheader on august 20th.
21 ... the Orioles lost the first 21 games of the 1988 season.
9 games from March 22 2002-April 9 2002