It's allergy season, and Harrison Barnes is concerned.
He sees what is making the Mavericks sneeze, sniffle and scratch.
Doesn't like it much, either. He sees the plays that allow opponents to take control of games and can't understand why they keep happening over and over.
"We can't let this guy get a bobble and then get a layup," Barnes said. "Or miss a block-out, and they get a rebound and a kick-out for a three.
"Those are the kind of plays that are backbreakers. And we're allergic to them. We're covered with hives."
The Mavericks know what they have to do.