By Jason Jordan The Tigers rolled in their first-round matchup with Jacksonville State, in large part due to Johnson’s unrelenting effort and impact. View the original article to see embedded media. K.D. Johnson trots out of the players tunnel onto the shiny hardwood court at Bon Secours Wellness Arena, calm and collected as he breezes through the pregame layup lines. He remains reserved amidst consistent roars from droves of Auburn fans; in fact, outside of sparsely placed high fives to teammates, the star Tigers guard almost comes across as stoic. If Auburn head coach Bruce Pearl is right ab…