With GSP out, it was promotion time for Whittaker, and a #1 contender opening for Rockhold, as he gets his chance to become the two-time middleweight champion of the world.
"I did what I did; I learned from my mistakes", said St-Pierre, who seems to attribute a recent bout of colitis to his calorific pre-UFC 217 diet.
In an interview with TSN, St-Pierre used his strongest language yet to prepare us for the seemingly inevitable vacating of his title.
Georges St-Pierre has vacated the UFC middleweight title he won just over a month ago when he defeated Michael Bisping.
"Of course in terms of weight, if I want to go back to compete at 185, obviously eating like I did what I did, I learned from my mistakes".
Before his lengthy hiatus began following a successful UFC welterweight title defence against Johny Hendricks in November 2013, GSP only competed in the 170-pound division.
It's been only 33 days since Canada native, St-Pierre won the title.
"I will be giving up my belt and once I'm healthy I look forward to working with the UFC to determine what's next in my career". Do you think that this is the right step for the UFC's 185-pound division?
Instead, interim strapholder Robert Whittaker (who was elevated to full-time champion) and former champion Luke Rockhold will square off for the 185-pound belt at UFC 221 on February 10 in Perth, Australia.
Mike Bohn is Rolling Stone's combat sports reporter.