The Chip Kelly cuts have commenced.
NFL Media's Rand Getlin reported that the Niners have also agreed to terms with Bears special teams assistant Derius Swinton to be their new special teams coordinator.
Mangini had been with the 49ers organization for three seasons, but was the defensive coordinator for just one year. Mangini worked as a tight ends coach and offensive consultant under Jim Harbaugh in 2014 and 2013, respectively. Twice a head coach in the NFL with the Jets and Browns, Mangini shouldn't be on the streets for long. His exit is more the result of a regime change rather than poor performance.