Four years ago, it seemed the Packers had a running back of the future. In 2014, Eddie Lacy ran for 1,134 yards and nine touchdowns, making him the 11th player in NFL history with at least 1,100 rushing yards and nine scores in each of his first two seasons. The other 10? Well, they were all pretty good for quite a while. In chronological order, they were Earl Campbell, Billy Sims, Eric Dickerson, Barry Sanders, Curtis Martin, Edgerrin James, LaDainian Tomlinson, Clinton Portis, Adrian Peterson and Chris Johnson. That’s a heck of a club for any running back to join, and it was reasonable to expect Lacy’s career to fall anywhere within the range set by those nine players.