Sinz was a four-year letterwinner with the Boilermakers from 2011 to 2014. Appearing in 48 games at tight end with 20 starts, he finished his career with 80 receptions for 670 yards and seven touchdowns. He was voted a captain by his teammates prior to his senior season. He led the team in receptions in 2013 (41) and ended his collegiate career with at least one catch in 24 consecutive games.
A native of Edgar, Wisconsin, Sinz earned his bachelor's degree in selling and sales management from Purdue in 2014. He was signed as an undrafted free agent by the Indianapolis Colts in the spring of 2015.