The signing is a low-risk deal, but it isn't one that is going to put them over the top, as some have suggested.
One Raiders fan commented on ProFootballTalk.com that he prefers Porter over Denver's Champ Bailey. His comment received over 100 "likes" from fellow Oakland fans.
The truth is Porter is an athletic defensive back that will be reunited with Dennis Allen (his secondary coach in New Orleans), but is far from being a top-tier cornerback in the NFL. Last year, Porter missed time after suffering seizure-like symptoms mid-season.
In Porter's absence, Denver's Chris Harris (who joined the team as an undrafted free agent in 2011) and Tony Carter (who joined the team as an undrafted free agent in 2009) earned more playing time and performed well, combining to record five interceptions. When Porter returned from injury late in the season, he was unable to win back his starting job from the young defenders.
Oakland is acquiring a 26 year old cornerback with medical concerns coming off a season in which he started four games. Porter now has another chance to prove himself again as a starter.
The Raiders also on Wednesday trading away quarterback Carson Palmer.