How well are the replacement refs doing? Not so well. Not so well at all, in fact.
During a matchup between the Baltimore Ravens and Atlanta Falcons, a replacement ref reviewed a play. After stumbling through the ruling, he said "Arizona will not be charged a timeout." This was, technically, true. The Cardinals were not charged a timeout ... because they weren't playing in the game.
Arizona played last Sunday against the Saints. The Cardinals play again tomorrow night in Kansas City. I just ... man it's going to be a long season.