Sharon Ellman/Associated Press
Hall of Fame running back Emmitt Smith sits atop the NFL's all-time rushing leaderboard with 18,355 yards.
Fellow Hall of Fame running back LaDainian Tomlinson expects it to stay that way forever.
"No one will ever break this record," Tomlinson said on NFL Network (h/t Pro Football Talk's Michael David Smith). "There's not enough opportunities that running backs will get. We know the shelf life is a lot shorter for running backs. I just don't see guys getting a lot of opportunities. That's a lot of yards for a guy to amass and I just don’t think it’s going to happen.