Kosi didn't see the field well last season with or without pressure...but under pressure he was clueless.
Look at this screenshot from the GT game. This was on 3rd and 8. It's clear at the snap the Brevin is going to be wide open on this play. There are EIGHT defenders to Perry's right. He never even considers looking left, where there's a huge potential running/throwing lane. Kosi locks on to JT and the pass is broken up by a linebacker. This is basic field awareness which N'Kosi failed terribly last season.
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