Patriots' head coach Mike Vrabel provided a cryptic response when asked why Stefon Diggs didn't play in Friday's preseason opener.

New England Patriots receivers coach Todd Downing revealed the biggest lesson veteran wideout Stefon Diggs currently faces.

With the first half of training camp over, Diggs has fully established himself as a leader in New England’s receiver room. In the meantime, he put himself on that right path as well — both physically in regards to his recovery from major knee injury, and mentally as far as the acclimatization to Josh McDaniels’ offense is concerned.