Vaughn, 28, originally signed on with the Broncos as an undrafted free agent out of Mississippi back in 2010. He spent two years in Denver before later being traded to the Colts in return for Chris Gronkowski.
Vaughn played two seasons for the Colts before later joining the Lions as an unrestricted free agent in April of last year. The Ravens wound up signing him to a contract shortly after this year’s draft, but he was among their final roster cuts.
In 2014, Vaughn appeared in 13 games for the Lions and totaled 19 tackles, two interceptions, a fumble recovery, and five passes defenses.
Prater, 25, was a fifth-round pick by the Bengals in 2012, but landed on the injured-reserve with a knee injury and was waived the following offseason. He later caught on with the Eagles before joining the Vikings for the past two seasons.
The Colts re-signed him to a contract a few weeks ago, but he’s been on and off of their roster this season.
This season, Prater has been active for one game, but has yet to record a single statistic.