6. Cameron Erving, Browns center: Erving was a mess during limited work at guard last season. His second NFL campaign will see the former first-rounder return to his natural position as Cleveland's pivot. Centers are ignored, but when the position breaks down, the offense often goes with it. After seven years of the super-steady Alex Mack playing at a Pro Bowl level, Erving's under a ton of pressure to step up. "I think he set his mind this offseason to come and make those changes and really try and fight and prove himself this year," teammate Joel Bitonio said of Erving, who has a prime chance to erase the memories of a rough NFL start.