Dirk Nowitzki was on the call for the entirety of Dallas’ win over its in-state rival. For two and a half hours, Nowitzki lobbed zingers at co-workers. “That was a Devin Harris special.

At the heart of that victory was Dirk Nowitzki, widely regarded as one of the greatest power forwards in NBA history and an icon of the Texas franchise. After leading the Mavericks to the pinnacle of ...