Christian McCaffrey is heading back to the Bay.  ESPN's Adam Schefter reports the 49ers have acquired Pro Bowl running back Christian McCaffrey from the Panthers in exchange for draft picks.  McCaffrey played college ball at Stanford before being selected by Carolina with the eighth overall draft pick in 2017.  The 26-year-old has been hampered by injuries in recent seasons after earning Pro Bowl honors in 2019.  The NFL Network reports the Niners are sending Carolina a second, third and fourth round draft pick in 2023 and a fifth-rounder in 2024.