Mason Swanson was sentenced to 10 months to three years for hurting a 3-month-old.
Investigators say Swanson squeezed the baby, broke its ribs and bruised its forehead.
The incident happened back in October 2011.
Swanson was found guilty of simple assault earlier this year.
Copyright 2015 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.