Green, Williamson’s third coach in three NBA seasons, told a wonderful story while in Big D about running into Jonas Valančiūnas twice after a recent practice — first in the weight room and later that night in an elevator. Valančiūnas informed Green that he was about to partake in an evening session of weightlifting after dinner. It’s no accident, in other words, that Valančiūnas is assembling the best season of his 10-year career at age 29. “You just don’t sneak up on the numbers and the greatness that he brings to our team,” Green said of Valančiūnas, who is averaging 20.0 points and 14.0 rebounds per game while displaying an expanding range from 3-point territory.