Success as a college football player doesn't always translate to stardom in the NFL.
Over the years, we've seen many top NFL prospects' careers fizzle out, including Heisman Trophy winners such as Matt Leinart, Robert Griffin III and Troy Smith.
Here are the college football stars we're most surprised didn't make it at the next level:
Alex Scarborough: Reggie Bush and Pete Carroll-era players at USC
Is it fair to call out the entire Pete Carroll era at USC? Those were great football teams with terrific players, but the number of talented offensive skill players who didn't translate to the NFL is still baffling to me.