It happens to just about every player at some point in their career. They find themselves on the outside looking in, fighting to keep a roster spot.
Age and injuries take a toll, and a player who once was a lock no matter what now becomes an expendable commodity because of younger, faster players.
The business end of the NFL can be a cruel mistress, but the reality every player must face one day is there will be an end to their career, or at least an end to their time on a given roster.
Cutdown to 75 players is Aug. 31, with the cutdown to 53 players not much longer after that. Time is not a marginal player's friend at this point.
Dolphins Featured Columnist Robert Hoffman did a comprehensive look at this situation earlier this summer here: http://bleacherreport.com/articles/422238-burst-the-35-notable-nfl-players-on-the-roster-bubble .
We'll update some of the players on that list and see what names have dropped off and been added since then.