RAVENS PASSING GAME: This is the biggest question going into the game, because we don’t know who will start at quarterback. Joe Flacco’s production had dropped even before he hurt his hip early in the team’s 23-16 loss to the Pittsburgh Steelers. He had a passer rating of 90 or higher three of the first four games but has cleared that mark just once in the past five. If he plays through the injury, recall how he struggled with a back injury in the first half of last season. If Lamar Jackson starts, we’ll get our first real glimpse of him as an NFL passer. Meanwhile, opponents have neutralized the Ravens’ top receiver, John Brown, holding him to 28 yards or fewer in three of the past four games.