#5 Georges St-Pierre

Very few fighters walk away from the UFC after a win, so legendary former Welterweight champion Georges St-Pierre is a total anomaly as not only did he hang up the gloves after having his hand raised, but he’s actually done it on two separate occasions – assuming you classify him as retired, of course.
The first instance came back in November 2013, as GSP – who had made a record 8 defenses of his Welterweight title – defended his title successfully for a 9th time against Johny Hendricks and then decided to step away from active competition, vacating his title. It wasn’t announced as a retirement per se, but the general consensus was that he probably wasn’t coming back.
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It was almost 4 years later when St-Pierre did return to action, this time at 185lbs, to challenge Michael Bisping for the UFC Middleweight title. And despite never fighting at Middleweight before and not being in any fights for such a long period of time, the Canadian looked as good as ever and choked Bisping out to become a dual-weight champion.
Since then though – citing various health issues including colitis – GSP has vacated that title and once again gone back into retirement. And at 37 years old and with no concrete rumours of a return, it looks like this time he’s gone for good – meaning he’ll probably be the only UFC fighter to retire twice, both times off the back of a win.