They were wrong. Maclin is INACTIVE and will not play vs. the Steelers. This comes after he suffered a concussion last week. He didn't practice until Friday when reports began to emerge that the Chiefs expected him to play.
He won't play, so it will be the Albert Wilson and Chris Conley show.
The Chiefs inactives vs. the Steelers:
QB Aaron Murray, DE Mike DeVito, LB Ramik Wilson, CB Marcus Cooper, WR Jeremy Maclin, OT Jah Reid, TE Brian Parker
Inactive for the Steelers is QB Ben Roethlisberger, who will be replaced by third string QB Landry Jones.