Tyrann Mathieu's status for Week 1 'up in the air'

Kansas City Chiefs star safety Tyrann Mathieu missed another practice Thursday after testing positive for COVID-19, putting his status in question for the team's season opener.

Mathieu, 29, was put on the reserve/COVID-19 list on Sept. 1. He's reportedly vaccinated, so all he needs to rejoin the team is two negative tests more than 24 hours apart and to be asymptomatic. It's unclear which of those prevents him from pract