Celtics' Tatum could make injury return on Friday

Tatum was upgraded from "out" to "questionable" on Boston's official injury report ahead of Friday's game against the Dallas Mavericks. Tatum has been making steady progress, including practicing with the Celtics' G League affiliate in February, but he and the team had shied away from giving a timeline for his return. Tatum was carried off the court in the fourth quarter of game four of the Celtics' Eastern Conference semi-finals loss to the New York Knicks and had surgery on May 13. He surprised...