crucial portions of their seasons trying to keep games alive. it s the raiders and the browns. reporter: tonight the world s most popular sports leagues are flailing, struggling to figure out when they can hold contests and the their schedules can survive the winter and the omicron outbreak. it is moving fast in the world and moving fast in sports. while there is a bit of a playbook now for how the leagues have dealt with it, different than in march 2020, omicron is proving to move through these locker rooms and these teams at a much higher rate of speed. reporter: the national hockey leak paused its entire schedule for a few days until after christmas after proven outbreaks affected several teens. after christmas, one nhl reporter says, it s nobody s guess. there is no guarantee they will play or resume their full schedule next week. what they re doing is calling a brief timeout. giving the players, the time and staff the time they normally get. we ll see where we are on box