Via multiple reporters on the beat, Reid said in his Thursday press conference that Kansas City's starters — including quarterback Patrick Mahomes — will play about a quarter in Saturday's preseason opener against Arizona.

Chiefs quarterback Patrick Mahomes is excited to play with the starters in the preseason opener against the Arizona Cardinals.

But openers don’t always go as planned. Last season, when the Chiefs played their preseason opener at Jacksonville, Patrick Mahomes played the first series, leading the Chiefs to a field goal. Backup Carson Wentz entered the game for the second series, in the first quarter. Before halftime, then-third team quarterback Chris Oladokun led a drive.