NFL teams need to find suitable replacements when a player's best isn't good enough.
As the 2017 regular season wraps up, every front office knows it will need to upgrade at least one or two starters during the offseason.
Age, disappointing play, injury histories and pending free agency can all be factors. Multiple issues will affect some players, and they'll no longer serve as significant contributors or even be with their respective teams.
Some struggling starters are more prominent than others and must be immediately addressed, either on the first day of free agency or early in the draft.