FILE - In this Oct. 19, 2017, file photo, from left, Paul George, Andre Roberson, Carmelo Anthony and Josh Heustis link arms during the playing of the national anthem before an NBA basketball game against the New York Knicks in Oklahoma City. Dallas Mavericks coach Rick Carlisle isn't sure what to expect from players during the national anthem when the NBA season resumes in empty arenas late this month in Florida. (AP Photo/Sue Ogrocki, File)