What the Super Bowl's biggest stars looked like when their careers started

The Denver Broncos and Carolina Panthers will square off on the NFL's biggest stage on Sunday in a game rife with storylines.

For some players, this Super Bowl has been a long time coming, as some of the biggest stars in the game are veterans in the league. We know Peyton Manning has been around the block, but the game will feature several other notable veterans like Jared Allen, Owen Daniels, Evan Mathis, Roman Harper, and plenty of others.

It's been a long journey for some of these players to get here.

Take a look at them now compared to their rookie years.