Chiefs linebacker Jovan Belcher reacts with teammates after sacking Ravens quarterback Joe Flacco during the second quarter of a Jan. 2011 Chiefs-Ravens game. Police say Belcher fatally shot his girlfriend early Saturday and then drove to Arrowhead Stadium and committed suicide in front of his coach and general manager. (AP Photo/Jeff Tuttle, File)
EPSTEIN: Belcher’s tragic death makes clear it’s hard to illuminate the heart

Chiefs linebacker Jovan Belcher reacts with teammates after sacking Ravens quarterback Joe Flacco during the second quarter of a Jan. 2011 Chiefs-Ravens game. Police say Belcher fatally shot his girlfriend early Saturday and then drove to Arrowhead Stadium and committed suicide in front of his coach and general manager. (AP Photo/Jeff Tuttle, File)

EPSTEIN: Belcher’s tragic death makes clear it’s hard to illuminate the heart

The Packers perfect season has come to as end as the defending Super Bowl champions were upset by Kansas City yesterday. The Chiefs, playing for interim coach Romeo Crennel, frustrated the Packers offense on their way to a 19-14 victory. (David E. Klutho/SI)
BANKS: Anything can happen in the NFL, as the Chiefs proved on SundayKING MMQB: Fifteen weeks in and the NFL season is still full of surprisesBANKS: Costly stretch leaves Tebow unable to orchestrate more magicMACK: Game-by-game fantasy observations, analysis from Week 16

The Packers perfect season has come to as end as the defending Super Bowl champions were upset by Kansas City yesterday. The Chiefs, playing for interim coach Romeo Crennel, frustrated the Packers offense on their way to a 19-14 victory. (David E. Klutho/SI)

BANKS: Anything can happen in the NFL, as the Chiefs proved on Sunday
KING MMQB: Fifteen weeks in and the NFL season is still full of surprises
BANKS: Costly stretch leaves Tebow unable to orchestrate more magic
MACK: Game-by-game fantasy observations, analysis from Week 16