OWINGS MILLS, Md. -- Baltimore Ravens coach John Harbaugh said Friday that he hasn't heard from the NFL office after lowering his face covering to argue with an official during Monday night's 34-20 loss to the Kansas City Chiefs.
The NFL Referees Association complained about the incident to NFL executive vice president of football operations Troy Vincent, according to NFL Network.
"I understand that we're all chasing perfection," Harbaugh said Friday. "We try to be as perfect as we can. It's a pretty hard standard to hold other people to. But you try to do the best you can.