The Baltimore Ravens haven't won an opening day game since the start of the 2013 season. The last time the Ravens won in week 1 of an NFL regular season, it was at home in 2012 when the Ravens demolished the Cincinnati Bengals by the score of 44-13 on Monday Night Football. So in other words, the last time the Ravens started out 1-0, the team won the Super Bowl.
In 2013, the Ravens as defending Super Bowl champions lost its chance to host a home game as defending Super Bowl champions always have done over the last decade.