This story appears in ESPN The Magazine's Oct. 29 NBA Preview Issue. Subscribe today!
HE IS A rookie starter and much is expected, yet as Jayson Tatum warms up with his teammates before his first NBA game, he appears impervious to the noise and the lights and the pulsating anticipation inside Quicken Loans Arena. This is the home of the Cleveland Cavaliers -- LeBron James' house -- and while Tatum is a teenage visitor, he prides himself on one particular basketball trait: He is rarely jittery on the basketball court.