What happened: Andy Reid made the start conditional on Patrick Mahomes avoiding a setback before Monday night. [Yahoo Sports](https://sports.yahoo.com/nfl/breaking-news/article/very-good-chance-patrick-mahomes-starts-week-1-vs-broncos-says-chiefs-coach-andy-reid-172525331.html) The Sept. 14 game kicks off at 8:15 p.m. ET.

Why it matters: Starting the opener would allow Kansas City to begin its season with Mahomes at quarterback. He had already been cleared to practice in July.

What to watch: Watch whether Mahomes gets through the remaining preparation without the setback Reid cited.