According to the NFL, this is what the Baltimore Ravens need to have happen if they want to clinch a playoff spot in week 16:

Baltimore clinches a playoff spot with:
 1)    BAL win or tie OR
 2)    KC loss + JAX loss or tie OR
 3)    KC loss + IND loss or tie OR 
 4)    SD loss or tie + JAX loss or tie OR
 5)    SD loss or tie + IND loss or tie

(See all the playoff scenarios for the entire league after the 'Jump')

2010 NFL PLAYOFF SCENARIOS FOR WEEK 16
 
AFC
 
  CLINCHED: New England – playoff spot
                        Pittsburgh – playoff spot
 
NEW ENGLAND PATRIOTS
 
New England clinches AFC East division and homefield advantage with:
 
1)    NE win or tie OR
 
2)    NYJ loss or tie
 
PITTSBURGH STEELERS
 
Pittsburgh clinches AFC North division and a first-round bye with:
 
1)    PIT win + BAL loss
 
KANSAS CITY CHIEFS
 
Kansas City clinches AFC West division with:
 
1)    KC win + SD loss or tie OR
 
2)    KC tie + SD loss
 
BALTIMORE RAVENS
 
Baltimore clinches a playoff spot with:
 
1)    BAL win or tie OR
 
2)    KC loss + JAX loss or tie OR
 
3)    KC loss + IND loss or tie OR
 
4)    SD loss or tie + JAX loss or tie OR
 
5)    SD loss or tie + IND loss or tie
 
NEW YORK JETS
 
New York Jets clinch a playoff spot with:
 
1)    NYJ win or tie OR
 
2)    JAX loss or tie OR
 
3)    IND loss or tie
 
 
NFC
 
  CLINCHED: Chicago – NFC North
                        Atlanta – playoff spot
                       
ATLANTA FALCONS

Atlanta clinches NFC South division and homefield advantage with:
 
1)    ATL win or tie 
PHILADELPHIA EAGLES 
Philadelphia clinches NFC East division with:
 
1)    PHI win OR
 
2)    PHI tie + NYG loss or tie OR
 
3)    NYG lossPhiladelphia clinches a playoff spot with:
 
1)    PHI tie OR
 
2)    TB loss or tie 
CHICAGO BEARS
 
Chicago clinches a first-round bye with:
 
1)    CHI win + PHI loss + NYG loss or tie
 
NEW ORLEANS SAINTS 
New Orleans clinches a playoff spot with:
 
1)    NO win or tie OR
 
2)    TB loss or tie 
NEW YORK GIANTS
New York Giants clinch a playoff spot with:
 
1)    NYG win