NFL refs expected to wear masks, could use electronic whistles
Portland beats Orlando 2-1 to claim MLS is Back championship
Official Athletics Website
MMQB: How Week 4 tested the NFL's COVID-19 protocols - Sports
Society for Features Journalism Promoting the craft of writing
NBC Sunday Night Football - Wikipedia
College football: Refs to follow strict COVID-19 guidelines
What to expect from NFL officiating in 2020 - coronavirus
AYSO Resources: What To Do During Your Break From The Soccer Field
High school referees waiting, some withdrawing, as possible season
COVID-19 pandemic thins already shrinking pool of Montana high