Miami Dolphins running back Ronnie Brown sustained a lisfranc fracture of his foot. This fracture is in a unique place at the mid foot and when fractured will create tremendous instability and dislocation in the mid foot or instep. If left untreated it can result in long term arthritis and disability.
The injury usually occurs when the foot is pointing down into the turf and someone lands on the heel.
In Ronnie Brown's case it was a season ending injury that required two tiny screws to help fixate the fractured and realign the joint, Ronnie should be good to play next season as he will be non-weight bearing in a cast for 6 weeks, and then the rehab will begin.