Clayton, 26, was selected in the fourth round of the 2010 NFL Draft by the Eagles out of Oklahoma. He played two years for the Eagles before being waived at the start of the 2012 season.
The Raiders would claim him off of waivers and keep him for a year before he was once again waived before the start of the season. He appeared in 15 games for the Raiders during the 2012 season and produced five total tackles.
Walters, 25, signed with the Bears as an undrafted free agent out of Delaware back in 2011. He spent the past three years in Chicago, mostly as a special teams contributor. Last year, he appeared in 13 games and totaled five tackles for the Bears.