NFL Network's Ian Rapoport tweeted this before last Thursday's game between the Denver Broncos and Kansas City Chiefs:
Expectation is it’ll be Jah Reid starting at OT tonight for #Chiefs, while Eric Fisher’s ankle heals. I’m told it’s strictly injury-related
— Ian Rapoport (@RapSheet) September 17, 2015
I do not believe this to be injury related because Fisher was listed as probable and a full participant in practice. Coaches can say mostly whatever they want without consequence; it's what he does that really matters.