I agree, but it is also within the sentencing guidelines. From a linked article within the article:
Kelly is scheduled to sentence Chrestman for his two felony convictions on Jan. 12. Estimated sentencing guidelines for his case recommended a prison term ranging from four years and three months to five years and three months.
The 4 years 7 months he got is a bit short of the mean. IMO the judge should have agreed with the prosecutors and given him the full sentence.