The Broncos outgained the Cowboys 357 to 165 in yardage, C.J. Anderson punched in a one-yard touchdown, and Kapri Bibbs scored twice.
Brock Osweiler threw for 190 yards and ran for 29 more, while Isaiah Burse added 153 all-purpose yards.
In four preseason games, the defending AFC champs allowed just 37 points and posted a whopping +62 point differential.
To an overdog with loads of depth and few questions, Thursday's game was mostly about special teams.
New placekicker Brandon McManus showed off his exceptional leg strength with five touchbacks on five kickoffs (Matt Prater was only 4/9 at Dallas last year).
However, he also showed the inconsistency that likely led to him losing kicking competitions the past two summers in Indy and New Jersey, respectively.
McManus made just two of his four FG attempts, missing wide from 52 and 53 yards, and making from 19 and 39.
Of course, on a team with very few high leverage kicks, the field position provided by (road and sea level) touchbacks has great value.
And hey, anything that convinces John Fox to attempt fewer field goals is a good thing, in our book.
Burse did provide one unsettling moment when he bobbled a fair catch, but was otherwise surehanded, and his two returns went for 18 and 26 yards.
The former Fresno State wideout also returned two kickoffs (for a pedestrian 21-yard average) and caught four passes for 65 yards.
Given the biggest signing bonus of Denver's undrafted rookie free agents, Burse figures to stick on the basis of his return abilities, especially given the loss of Jordan Norwood for the season.
It was a productive night for the undrafted CSU Rams, Bibbs and Shaq Barrett.
Barrett twice sacked Cowboys quarterback Dustin Vaughn, each time for an 11-yard loss.
Denver appears to have escaped the game without any injuries.
Cuts down to the 53-man roster limit are due by 4pm ET on Saturday.
Note: There will be no Gut Reaction tonight, because TJ is off on a bender.
Mike Klis says Kevin Vickerson and Duke Ihenacho were playing for their jobs tonight, but we find it hard to believe that Mitch Unrein and Juwan Thompson were doing the same.
Jeff Legwold thinks Big Vick and Unrein might have been competing for one roster spot.