Prior to returning to Cincinnati, Manning spent the 2011 season at his alma mater, the University of Michigan. He served as the offensive graduate assistant on head coach Brady Hoke's staff, working mainly with the offensive line and helping lead the Wolverines to an 11-2 record, including a win in the 2012 Allstate Sugar Bowl.
Manning spent the 2010 season with the Bearcats as a defensive assistant. He assisted the defensive staff in all aspects on and off the field, including film breakdown, quality control, scouting and practice preparation.
Prior to his appointment in Cincinnati, Manning spent three seasons in the NFL with five different teams. He signed as a free agent with the Green Bay Packers in 2005. He played in 15 games and started two contests as a rookie, tallying 41 tackles and one pass breakup. Manning tied for third on the team with 21 stops on special teams. He also had stints with the Houston Texans, Buffalo Bills, Jacksonville Jaguars and Cincinnati Bengals.
Manning was a four-year letterman for the Wolverines (2000-04) who played in 37 career games and made 10 starts at linebacker as a fifth-year senior. He was named the Roger Zatkoff Award winner as the team's top linebacker in 2004 after posting 39 tackles, six tackles for loss and one sack. Manning finished his career with 72 stops, nine TFLs and three sacks.
Manning earned his bachelor's degree in general studies from U-M in 2004. He is a 2000 graduate of Saginaw High School in Saginaw, Mich. Manning lettered in football, basketball, baseball and track and was named the male scholar-athlete of the year at Saginaw.