4. Josh Cribbs
Josh Cribbs blazed a most unlikely trail to NFL stardom. A dual-threat quarterback at Kent State, he started all four years and still holds half a dozen career records at the school, including total offense and touchdown scored. He is the only player in NCAA history to lead his team in both rushing and passing all four seasons.
Despite his accomplishments, Cribbs was not selected in the 2005 NFL Draft and signed as an undrafted free agent with the Cleveland Browns. His speed and elusiveness proved to be an asset, as he made the team as a kickoff specialist. He averaged 24.5 yards per return in his rookie season, and his total of 1,094 return yards set a franchise record.
Cribbs would go on to become the Browns' punt returner as well. Six seasons later, he's a two-time Pro Bowler and was named to the NFL's All-Decade Team in the 2000s as a return specialist. He also has sometimes lined up behind center in the Wildcat formation, which the team has dubbed "Flash" in honor of the former Golden Flashes quarterback. Last year, he re-signed with the Browns for a three-year, $20 million contract. That would've been good for any quarterback, let alone an undrafted free agent.