Mathieu — when healthy — is the undisputed emotional leader of the entire Chiefs’ defense. His aggression on the back end is sorely needed (particularly in terms of turnover creation). Mathieu’s vocal enough to get the defense lined up properly, and he has the versatility to come up in run support, spy the opposing QB, backtrack in coverage, guard slot receivers, and even blitz off the edge.
— Read on Predicting Where Tyrann Mathieu Will Sign