49ers' Shanahan admits to McCaffrey-Mitchell usage mistake vs. Rams

Christian McCaffrey leads the NFL rushing attempts (42) and yards ( 268 ) through two weeks .

Elijah Mitchell was one of four 49ers active, healthy, in-uniform players who did not see any action Sunday in the 30-23 victory over the Los Angeles Rams .

Coach Kyle Shanahan admitted Monday the team made a mistake with their lack of a rotation at running back.