It 's a really small sample size to work with , but it 's all we have .
The truth is Walker 's NFL career was fairly disappointing , but over his last three seasons he averaged 4.9 yards per carry on 47 attempts .
NFL 's a really small sample size to work with , but NFL 's all we have .
The truth is Walker 's NFL career was fairly disappointing , but over his last three seasons he averaged 4.9 yards per carry on 47 attempts .