The linebackersLavonte David will man the weak side, Mason Foster the middle and Jonathan Casillas the strong side. That is, unless Dane Fletcher steals a job. Versatile and good enough to start, Fletcher is a player to watch in this camp and again in training camp. He’s going to get a chance to unseat either Foster or Casillas. And if Dane unseats Foster, Foster could eventually unseat Casillas. The only lock here is David. Everyone else is fighting for playing time.