Ben Roethlisberger led the NFL in passing attempts and yardage in 2018 while setting a career-high with 34 touchdown passes. With 15 NFL seasons under his belt, he's also trusted to make a lot of his own calls at the line of scrimmage. He's averaged at least 272 yards passing per game every season for the past five years and there's no reason to think he's going to go under that for 2019.
Despite his big yardage totals, Roethlisberger has never produced more than the 34 touchdown passes he had last year. He also is now without Antonio Brown this season, which helped produce a lot of those big yardage seasons. The Steelers feel they have the cast in place to help make up for the loss of Brown, but that could mean leaning more heavily on the running game in 2019, which would affect Roethlisberger's passing numbers.
2019 Bottom Line
Roethlisberger isn't going to give you much as a runner anymore, which hurts his overall value, but he's a player who can single-handedly win you a game if the matchup is right. That's especially been true when he's been at home over the past five or six years. He might not be an every-week starter, but he's just outside the top-12 in fantasy quarterbacks and is a valuable backup who will have several weeks where he outproduces your starter. Even at 37, he should produce 4,500-plus yards and 25-plus touchdowns again in 2019.