The season started strangely with three consecutive 0–0 ties. After a 0-2 loss to the Packers, the Bears had scored zero points in four games. After that, the offense got on track and the defense stayed incredibly stingy. The Bears were undefeated in their last nine "regular season" games (there was no established playoff system), with six wins, four by shutout, and three ties.
The team that gave the Bears the most trouble were the Portsmouth Spartans. The club tied with the Spartans with identical 6–1 records (ties did not count then and were omitted), so a playoff game was set up to determine a winner. The Bears defeated the Spartans, 9–0 in the first ever NFL postseason game, which oddly enough was played indoors at Chicago Stadium because it was expected to be cold at Wrigley Field and organizers wanted to maximize the attendance and gate revenue.
For the year, the powerful tandem of Red Grange and Bronko Nagurski again paced the Bears as Grange scored 7 touchdowns and Nagurski ran for 4 and also passed for 3 more. Keith Molesworth also contributed with 3 touchdowns on his own while passing for 3 more. Luke Johnsos had probably his finest season, catching two touchdown passes and scoring twice on defense as well. Coach Ralph Jones also found a reliable kicker in Paul "Tiny" Engebretson.