According to Bob Marchionte of College2Pro.com, the Steelers have private workouts scheduled with North Alabama SS/FS Nick Williams, and South Florida G/FB Lawrence Martin.

Nick Williams is a 6’2″, 215 lb safety who had 62 tackles and 2 interceptions last year with North Alabama. He missed the entire 2012 season due to a torn left ACL that he suffered during the first 2012 preseason game. I’m not a fan of highlight reels, but being that he’s from a smaller school, it’s difficult to find full games.
https://www.youtube.com/watch?v=A7hSdXMMqGc

Lawrence Martin is an interesting prospect. He started last year at right guard, but due to injuries, he moved to full back, and even TE at times. He’s 6’3″, 316 lbs and is pretty nimble for his size. Here are some highlights made available by USF.

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