Coming off their win over the Redskins, the Ravens stayed at home for a crucial Week 15 AFC North rematch with the Pittsburgh Steelers with the division title on the line. After a scoreless first quarter, Baltimore scored in the second quarter with a 28-yard field goal by kicker Matt Stover.  The Steelers would respond with a 31-yard field goal from kicker Jeff Reed, yet the Ravens gained the halftime lead as Stover kicked a 26-yard field goal.  Baltimore would increase their lead in the third quarter as Stover made a 28-yard field goal.  However, in the fourth quarter, Pittsburgh would win the game as Reed nailed a 30-yard field goal, followed by quarterback Ben Roethlisberger completing a 4-yard touchdown pass to wide receiver Santonio Holmes. With the loss, the Ravens fell to 9-5 being swept by the Steelers for the first time since 2002.
Question: How many games had the Ravens lost before this game?
Answer: 4