Packers-49ers could turn on Christian McCaffrey vs. a vulnerable run defense

Eric Williams

NFC West Writer

San Francisco 49ers All-Pro running back Christian McCaffrey was in the MVP conversation this season and has been a problem for the league all year.

On Saturday when the NFC’s No. 1 seed hosts the upstart Packers (8 p.m. ET on FOX and the FOX Sports app), he likely will be a big problem for Green Bay…