Turnovers by the Ravens in the first quarter (fumble by Ray Rice and interception thrown by Joe Flacco).
Pass-interference penalties by the Ravens (Domonique Foxworth, Frank Walker and Lardarius Webb) in the first half. The Ravens' 11 pass-interference penalties are the most in the NFL this season.
The wind chill index at the opening kickoff at Lambeau Field.
First-half deficit by the Ravens, which tied their largest shortfall in any game this season (at Minnesota and at Cincinnati).
Ed Reed's streak of games played, which ended at Green Bay. He has hip and ankle injuries.