Bernard Clark officially replaced Joe Tumpkin as Pitt's linebackers coach. Clark played at Miami in the 1980s when Wannstedt was the DC there, so they're obviously familiar with each other. He was a standout there and an MVP award in the 1987 National Championship game helped him to a 3rd round draft pick in the 1990 NFL Draft. His pro career was short-lived, but I think when it comes to recruiting, it always helps when you have coaches on your staff that made it to the NFL.
Probably the best thing for Pitt is that he has lots of Florida ties and hopefully that will help with recruiting in the area. He grew up in Florida and while his last job was as DC at Hampton University in Virginia, he also coached the defensive lines at South Florida and Florida International.
He also looks like one mean dude, and that's got to count for something.
All in all, looks like a solid hire. Proven winner with previous coaching experience and should help Pitt go after the Florida recruits.