The Baltimore Ravens didn't add any starting offensive linemen this offseason. They didn't sign someone to replace a Pro Bowl fullback, and their biggest acquisition in the backfield was pass-catching running back Danny Woodhead.
So how do the Ravens expect to improve one of the NFL's worst rushing attacks? It begins with the impressive track record of assistant coach Greg Roman.
From San Francisco to Buffalo, Roman has shown a knack for turning sputtering ground games into highly successful ones in his first season with a team.
Roman takes over a Ravens rushing attack that in 2015 and 2016 averaged 91.9 yards per game in those two seasons combined. Only the Chargers and Lions have averaged fewer yards the past two seasons. In 2011, in Roman's first season as San Francisco's offensive coordinator, the 49ers went from No. 19 in NFL rushing to No. 8. In 2015, the Bills' run offense jumped from No. 25 to No. 1 in Roman's first year as the playcaller, improving by a whopping 59.4 yards per game.