Mel Kiper Jr.'s QB Watch

Mel Kiper Jr.'s QB Watch (4:32)

Mel Kiper looks at the QB's with the biggest shoes to fill (4:32)

Sam Bradford, Tim Tebow, Jimmy Clausen and Colt McCoy, gone to the NFL, are truly tough QBs to replace. But somebody has to do it. Today on SportsCenter, John Buccigross spoke with ESPN NFL Draft Insider Mel Kiper Jr. about the guys looking to fill those big shoes.