The NBA told its head coaches Saturday they may work without masks during games if they have been fully vaccinated. All eight coaches whose teams had playoff openers Saturday—Miami’s Erik Spoelstra, Milwaukee’s Mike Budenholzer, the Los Angeles Clippers’ Tyronn Lue, Dallas’ Rick Carlisle, Boston’s Brad Stevens, Brooklyn’s Steve Nash, Portland’s Terry Stotts and Denver’s Michael Malone—all roamed their sidelines without masks, the first time all season that coaches were permitted to do so. Another notable change now that the playoffs are here is that crowds will be much bigger than was the case in the regular season. The Heat announced Saturday that they have been approved to have 17,000 fans starting with Game 3 of their matchup against Milwaukee on Thursday, the biggest known attendance number in the league so far this year. Boston and Atlanta, without specifying exact numbers, said they would be near capacity in their buildings for …