The NBA bubble has held. So has the NHL's double bubble. The WNBA and MLS, no leaks.In this unprecedented landscape of sports in a pandemic world, one indisputable fact has emerged: bubbles work.Thousands of tests, minimal to no positive COVID-19 test results.So as the NCAA gets set announce its plans for the 2020-21 college basketball season, there are clear precedents and blueprints in place should it decide to go the bubble route.“It's certainly viable,” said Mark Starsiak, vice president of sports at Intersport, a Chicago-based sports marketing and media agency, “From a basketball standpoint, I think we can follow those models.”The college football restart has been scattershot.