Report: 49ers hire Eric Mangini as defensive coordinator
The team and Mangini reached agreement on a three-year contract, Schefter reported.
Mangini spent last season as the 49ers' tight ends coach and the previous season as their senior offensive consultant.
This season the 49ers ranked fifth in the NFL in total defense and 10th in scoring defense.
San Francisco posted an 8-8 record and finished in third place in the NFC West.