Vaughn, 6-4, 241 pounds, was originally signed to the Denver Broncos as an undrafted rookie free agent in 2006 and spent his entire rookie campaign on the practice squad. This season, Vaughn was a member of the Arizona Cardinals practice squad before being released on Sept. 25. He is a graduate of Louisiana State University where he competed in 52 career games while totaling 239 tackles (121 solo) and seven sacks.