Injuries are a part of football. A very physical sport with very big people moving very fast is bound to lead to people getting hurt. When injuries become problematic is either when they hit the top-level players on a team or when they hit a specific position group especially hard.
For the Cleveland Browns, the latter has been a problem during the first week of training camp. The wide receiver position, which wasn’t considered overall deep to begin with, has been hit with a few important injuries.
The first two, David Bell and Anthony Schwartz, are not expected to be major but could cost each player important practice time. For Bell as a rookie, early assimilation is important. For Schwartz, getting confidence back after a rough rookie year would be vital.