Eric Mangini: It makes sense for 49ers to draft Justin Fields at No. 3 FIRST THINGS FIRSTGet the Full StoryRookie quarterback Justin Fields will throw at Ohio State s second Pro Day, and San Francisco 49ers head coach Kyle Shanahan is expected to attend. Free Agent Richard Sherman praises Fields, and believes the Niners should draft him at No. 3. Eric Mangini joins First Things First to decide whether he agrees with Sherman, and Fields could find himself in San Francisco.