LAS VEGAS — There’s a calming kindness that radiates off of Xavier Tillman, his voice is soft, direct, with a bit of a smile lilting it up and open-ended, his eyes are warm, and all of that absolutely vanishes the second he steps on court.

For the Grizzlies Summer League team, Tillman and Desmond Bane are like two storms converging. Bane, in his pushing of team pace and tempo like a gradually rising wind, and Tillman more brooding, slow-building and waiting for his moments to rumble over an opposing team’s best defensive efforts or crack back with a shot from deep, thunder and lightning both. Part of their well-paired, storming cadence comes from being the two designated veterans on the roster and what one full and occasionally discordant NBA season has taught them, but another part comes from their natural tendency to push.