The primary reason that the NFL felt comfortable initially holding the Pittsburgh Steelers’ game against the Baltimore Ravens on Sunday following the initial postponement was because they believed that they had established the transmission window, and felt comfortable in their assumption that they were nearing the end of it.
The fact that the Ravens were in the facility on Monday and Tuesday for walkthroughs complicates the timeline in ways we may not realize, or even know later on down the road. Running backs J.K. Dobbins and Mark Ingram tested positive on Sunday night, after which the league shut down the Ravens’ facility.