Hester, who is cousins with Devin Hester, joins the Lions after spending the 2013 offseason with the Denver Broncos. He ended up in Denver after signing as an undrafted free agent out of UCLA around this time last year, but the Broncos let him go during the final round of cuts in August.
As for Ness, he's been in the NFL since 2009. He began his career as an undrafted free agent out of Arizona, and he's spent time with several teams, including the Miami Dolphins, Seattle Seahawks, St. Louis Rams and, most recently, Carolina Panthers.
It's worth noting that Hester is 6'2 and Ness is 6'1. Lions defensive coordinator Teryl Austin hinted earlier in the offseason that he likes bigger cornerbacks, and Hester and Ness both seem to fit that description. Granted, both players are coming to Detroit as nothing more than camp bodies right now considering there are seven other cornerbacks already on the roster, but that's still interesting nonetheless.