Chicago Bulls

45 seasons, 30 playoff seasons, 6 NBA Championships

Best season: 72-10
Worst season: 15-67
2010-11:

62-20

 Playoffs, Eastern Finals
2009-10:

41-41

 Playoffs, first round
2008-09:

41-41

 Playoffs, first round
2007-08: 33-49  
2006-07: 49-33 Playoffs, second round
2005-06: 41-41 Playoffs, first round
2004-05: 47-35 Playoffs, first round
2003-04: 23-59  
2002-03: 30-52  
2001-02: 21-61  
2000-01: 15-67  
1999-00: 17-65  
1998-99: 13-37  
1997-98: 62-20 NBA Champions
1996-97: 69-13 NBA Champions
1995-96: 72-10 NBA Champions
1994-95: 47-35 Playoffs, second round
1993-94: 55-27 Playoffs, second round
1992-93: 57-25 NBA Champions
1991-92: 67-15 NBA Champions
1990-91: 61-21 NBA Champions
1989-90: 55-27 Playoffs, Eastern Finals
1988-89: 47-35 Playoffs, Eastern Finals
1987-88: 50-32 Playoffs, second round
1986-87: 40-42 Playoffs, first round
1985-86: 30-52 Playoffs, first round
1984-85: 38-44 Playoffs, first round
1983-84: 27-55  
1982-83: 28-54  
1981-82: 34-48  
1980-81: 45-37 Playoffs, first round
1979-80: 30-52  
1978-79: 31-51  
1977-78: 40-42  
1976-77: 44-38 Playoffs, first round
1975-76: 24-58  
1974-75: 47-35 Playoffs, Western Finals
1973-74: 54-28 Playoffs, Western Finals
1972-73: 51-31 Playoffs, first round
1971-72: 57-25 Playoffs, first round
1970-71: 51-31 Playoffs, first round
1969-70: 39-43 Playoffs, first round
1968-69: 33-49  
1967-68: 29-53 Playoffs, first round
1966-67: 33-49 Playoffs, first round