Hull was a very hard working overachiever and a ST ace, but players like him don't last long on a roster as you are always looking to upgrade players like him.
Pro Football Talk wrote:
In addition to parting ways with Jones, the Dolphins announced a handful of other departures. Linebacker Mike Hull has been released with a failed physical designation after missing last season with a knee injury. He played 43 games between 2015 and 2018.https://profootballtalk.nbcsports.com/2 ... orton-too/
Defensive tackle Kendrick Norton was waived after spending last season on the non-football injury list. They also waived offensive lineman Evan Brown, cornerback Rashard Causey, tackle Chidi Okeke and wide receiver T.J. Rahming.