Beckham, insists Arena, is carrying several light injuries.
"David has an assortment of nagging injuries," Arena said. "Just been smart about getting him the right kind of rest and working him in the gym.
"Don't even know the exact pecking order of the injury list," said Arena, whose team is 1-2-0. "I'll leave it at that. Our trainer's dealt with a few things."
Asked if he was confident Beckham could play, Arena replied: "Haven't made a decision." Will he make the trip to Kansas? "Haven't decided."