Cleveland Cavaliers

41 seasons, 18 playoff seasons, 0 NBA Championships

Best season: 66-16
Worst season: 15-67
2010-11:

19-63
2009-10:

61-21

 Playoffs, second round
2008-09:

66-16

 Playoffs, Eastern finals
2007-08: 45-37 Playoffs, second round
2006-07: 50-32 Playoffs, NBA Finals
2005-06: 50-32 Playoffs, second round
2004-05: 42-40  
2003-04: 35-47  
2002-03: 17-65  
2001-02: 29-53  
2000-01: 30-52  
1999-00: 32-50  
1998-99: 22-28  
1997-98: 47-35 Playoffs, first round
1996-97: 42-40  
1995-96: 47-35 Playoffs, first round
1994-95: 43-39 Playoffs, first round
1993-94: 47-35 Playoffs, first round
1992-93: 54-28 Playoffs, second round
1991-92: 57-25 Playoffs, Eastern Finals
1990-91: 33-49  
1989-90: 42-40 Playoffs, first round
1988-89: 57-25 Playoffs, first round
1987-88: 42-40 Playoffs, first round
1986-87: 31-51  
1985-86: 29-53  
1984-85: 36-46 Playoffs, first round
1983-84: 28-54  
1982-83: 23-59  
1981-82: 15-67  
1980-81: 28-54  
1979-80: 37-45  
1978-79: 30-52  
1977-78: 43-39 Playoffs, first round
1976-77: 43-39 Playoffs, first round
1975-76: 49-33 Playoffs, Eastern Finals
1974-75: 40-42  
1973-74: 29-53  
1972-73: 32-50  
1971-72: 23-59  
1970-71: 15-67