Brown isn't the first referee to have to leave the field this season.
The Detroit Lions need to win their final three games to keep their post-season hopes alive.
HALFTIME: Detroit leads Chicago, 13-3.
If Detroit does not beat the Chicago Bears, for starters, its chances of making it to the playoffs are likely over. Last week, John Fox and the coaching staff unleashed rookie starting quarterback Mitchell Trubisky. The character, if you're unfamiliar, is very adamant that players who don't give it their all with a big-time celebration shouldn't be awarded the six (or seven) points that actually come from a touchdown. Chicago has just 33 yards of total offense so far. The Lions' defense ranks 27th overall but it has proved it can be opportunistic against bad teams.
Inactive for the Lions are center Travis Swanson (concussion), right tackle Rick Wagner (ankle), wide receiver Bradley Marquez, guard Emmett Cleary, defensive tackle Rodney Coe and running backs Zach Zenner and Dwayne Washington.
Bears outside linebacker Pernell McPhee and nose tackle Eddie Goldman, who each missed Sunday's game with injuries, are both active.