Domata Peko is the run stuffer we didn't have last year.  His presence is the big reason our run defense is better than it was last year.  In 2016, several RBs had awesome games against us because we didn't have anyone on our D-line who was really good at stopping the run.  Peko is a big improvement over Sylvester Williams, whom we let walk in free agency and who is now with the Titans.  Sylvester started at nose tackle in Denver mainly because we didn't have anybody else who played the position full time.  He got run over frequently while he played for us and now is having the same problem in Tennessee.  Congrats to John Elway for a smart free agent signing.