Roosters half Sam Walker, in his 100th NRL match, celebrated at Suncorp Stadium in style with a try, a controlled performance and two try-saving tackles to take the Tricolours to third on the ladder.
Queensland front-rower Collins was ruled out of the match at halftime with delayed concussion symptoms and will undergo recovery protocols in Maroons camp.
The 11-day stand down will mean the 30-year-old prop is still eligible to play in the Origin decider at Suncorp Stadium.
He was also placed on report for a high shot in the 10th minute on Brisbane lock Xavier Willison, who left the field with a head knock and did not return
Walker, also the Maroons half, was put on report for a shoulder charge on Reece Walsh but there didn't appear to be much in it. Roosters centre Robert Toia, another Maroons star, was booked for a lifting tackle on winger Josiah Karapani.
"I don't think there'll be much in it for those guys. I think they'll be pretty clear for (Origin)," Roosters coach Trent Robinson said.
The Broncos have now lost seven in a row and are the worst performed defending premiers in the history of the NRL. They will likely need to win eight of nine matches remaining to make the finals, a forlorn task.
Bench forward Aublix Tawha added to their injury woes, leaving the dressing rooms in a moon boot after a suspected ankle injury.
Broncos coach Michael Maguire bristled when it was suggested they had their work cut out to play in September.
"I wouldn't say it's an uphill battle with the team I've got here," he said.
"People can say whatever they like, but the belief I have in this group and the journey I've had with them tells me they're a great group.
"They fought like hell tonight for each other."
The Broncos led 16-12 at halftime after the Roosters made far too many errors, but they rallied superbly after the break.
"I loved the mentality. They adjusted," Robinson said.
"It wasn't completely pretty but we controlled the second half through our mentality and simplicity."
The Roosters scored the opening try through winger Billy Smith after the Broncos failed to defuse a bomb.
Walker then made two try savers, one around the legs of prop Preston Riki and another desperate effort on the tryline to deny hooker Cory Paix.
The Broncos scored through a wonderful ball by second-rower Brendan Piakura to five-eighth Thomas Duffy after a blatant forward pass by half Ben Hunt.
Piakura scored himself after an exquisite Duffy grubber to take a 12-6 lead before James Tedesco, playing his 200th game for the club, replied with a lovely short kick of his own for centre Robert Toia to equalise.
On the cusp of halftime a loose Daly Cherry-Evans pass was scooped up by Broncos centre Grant Anderson who raced away.
Smith, who made four errors in the first half, showed immense strength to score the first try in the second half.
Walker extended the lead by starting and finishing a 50m attacking raid. Both sides exchanged penalty goals before a tense final seven minutes.
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