The Colts' biggest weakness this season is an interesting, albeit sad, battle.

On one hand, you have an abysmal offensive line in a system that was based around deep passing. That's not a good match.

On the other hand, you had a thin, injury prone secondary in a defensive system that likes to bring the blitz. Also not a good match.

The combination of the two helped kill the Colts at crucial times throughout the season, none bigger than the team's season ending loss in Baltimore. The offensive line allowed Luck to be pressured all game, negating the deep ball, and the defensive backs allowed Joe Flacco and Anquan Boldin to connect on rainbow throw after rainbow throw in the second half, allowing the Ravens to get two second half touchdowns. If not for a couple of Ray Rice fumbles, it could have been even worse.

Today, I want to talk abou the latter as the Colts look towards 2013. Specifically, Cassius Vaughn and Darius Butler, two players who started for the Colts, despite having no business being starters, and who are free agents this year. Butler is an unrestricted FA, while Vaughn is restricted. But who is better for the Colts as they look forward?