DALLAS — Before Derrick White’s third-quarter flurry Saturday, which he might have needed more than the Boston Celtics did, came a three-word message from Joe Mazzulla. As White missed his ...

Derrick White was back in his bag in the second half of the Celtics win over the Mavericks on Saturday night. The elite two-way guard was on fire for a large chunk of the beginning of Boston’s ...