The Cavaliers beat the Wizards on Friday, which is what they were supposed to do. The way they did it, however, was less reassuring. Cleveland needed every bit of Donovan Mitchell’s 48 points, including 24 in the fourth quarter, to escape Washington with a 130-126 win. That is not usually how games against 3-20 teams are drawn up, but this one turned into a reminder of how thin the margin can get when focus drifts. As if the Cavs (15-11) needed another reminder this season. “You’re playing a team that’s 3 and whatever, and you’re down 15, you can kind…
