Manning, a former second-round draft pick by the Chicago Bears, played nine years in the NFL. He spent the first five years of his career with Chicago before signing with the Texans in 2011.
Last season, Manning appeared in all 16 games for Houston and recorded 46 tackles and one fumble recovery. He was a free agent prior to retiring.
Manning, 32, ends his career having made 96 starts and playing in 128 games. He finishes his career with 549 tackles, 11 interceptions, 4.0 sacks and six fumble recoveries.
In 2008, Manning was named a first-team All-Pro as a kick returner after recording 1,070 return yards and averaging a league-leading 29.7 yards per kickoff return.
- Molly Geary