Rookie quarterback Mitchell Trubisky had a spectacular debut for the Bears, completing his first 10 passes against the Broncos. Elsewhere, the projected starter at middle linebacker for the Dolphins was injured.
NFL Nation reporters recap the day with what you need to know from training camps and preseason games across the league:
Denver Broncos
Both Broncos quarterbacks gave played like I've seen guys in quarterback competitions play over the years -- they take the completions, often too quick to check down, instead of waiting for the routes downfield to develop. It's a natural reaction to try to win the job and Paxton Lynch really in that mode on the last possession.