SEE ALSO: York's reaction to reported new PSU coach | Patriots' O'Brien, Penn State finalizing contract

Bill O'Brien, Penn State's reportedly permanent replacement for ousted football coach Joe Paterno, has been working on assembling his staff, ESPN.com said Friday.

Titans offensive quality-control coach Charles London is expected to go to work for O'Brien as running backs coach, an NFL source told ESPN's Adam Schefter.

Click here for ESPN's full story.