Secondary a major weakness

Mike Chappell points out that the Colts defense didn’t do so well when defending the pass:

Two sets of numbers speak volumes when the topic turns to the Indianapolis Colts’ secondary:

71.2, 103.9, 8: In order, that would be the completion percentage allowed by the Colts’ pass defense in 2011, the highest in NFL history; the passer rating by opposing quarterbacks, the fifth-highest rating allowed in league history; and interceptions by Colts defenders, tied for the fewest in the league last season.

We’ve discussed passer rating differential in the past and know this is an important measure unless you’ve got a sure-fire hall-of-famer at QB.