Chubb (knee) is on the reserve/PUP list to start the regular season, ruling him out for at least the first four games.
The Browns made it official Tuesday after it was widely reported Monday. The 28-year-old running back has been working out, running and even doing agility work throughout the summer, but he still hasn't resumed practicing with the team since suffering an ACL tear last September. Jerome Ford is set to lead Cleveland's backfield early in the season, just as he did for much of last year.