If you read the text in front of it, I believe he means if the Ravens win their remaining home games vs. Dolphins and Eagles, that would push their win total to 8....Granted, it definitely was a bit confusing how he worded it by sticking the parentheses in there stating we are favored by 3.5 over the Dolphins
"The Ravens must become road warriors. Their November wins all came at home, where they’ll play the Miami Dolphins Sunday and the Philadelphia Eagles on Dec. 18. If the Ravens truly are playoff contenders, they’ll find a way to keep holding serve at home. (They’re favored by 3½ points Sunday against a Miami team on a six-game winning streak.) That would push their win total to eight, but they’ll need more, bringing into focus the importance of their remaining road contests at New England, Pittsburgh and Cincinnati – all tough spots. The Ravens have to win at least once and maybe twice, no easy feat for a team that is 10-19 on the road since the Super Bowl."