And this is from 2016, I believe, not last year, but illustrates the point of the lack of pressure and how it affects the Colts D.
I know some don't like Football outsiders rankings, but I point it out mainly to illustrate the Colts had the lowest pressure ranking in the league that year, only less than 20% of pass plays.
They secondary actually performed middle of the pack when compared to with and without pressure standings vs the rest of the league
http://www.footballoutsiders.com/sta...-pressure-2016