Conor McGregor took one last shot at his long-time rival Dustin Poirier ahead of his retirement.The pair have faced off against each other three times, with Poirier leading 2-1 against the Irishman, with their devastating last fight keeping him out of the Octagon for four years.McGregor’s last UFC fight was his trilogy bout with Poirier in July 2021GETTYMcGregor watched the last man to beat him retire from MMA last night at UFC 318.With the opportunity to even the score now off the cards for the rivals, in lieu of Poirier’s retirement.Speculation is growing around McGregor’s return after he recently declared his interest to return to the octagon. The news came following the US President Donald Trump revealing his hopeful plans for a historic UFC card at The White House.After watching Poirier’s last bout, it didn’t take long for the Irishman to share his reactions to UFC 318 on social media. McGregor took to X to share his thoughts on the matter, concluding his remarks with the familiar “pea head” insult.It was a jab he originally used before knocking out Poirier in 2014.The now deleted post on X read: “We love a good scrapper in the company and them two boys are just that! Scrappers!“Awesome stuff! Great fight lads, bravo!“R.I.Pea head!”Poirier and Holloway settled their score at 2-1GettyIn the main event of the event, BMF title holder Holloway outpointed Poirier over five thrilling rounds.It was Holloway’s relentless volume of strikes that ultimately earned him a unanimous decision victory.Holloway then took the opportunity to call out reigning lightweight champion Ilia Topuria.He said: “I’ve got some history with the champ. UFC, it’s your move next, baby, but I’m done talking,” Then, shifting focus to his opponent, he said: “This is Dustin’s retirement fight — give it up to my man.”After debuting in the UFC in 2011, Poirier compiled 22 wins out of his 32 bouts, with two of those coming against Holloway.Poirier has now officially retired from MMAGettyGettyPoirier poignantly placed his gloves in the middle of the Octagon to signal his retirement[/caption]Poirier, a former interim lightweight champion and one of the most respected figures in the sport, bowed out at age 36.‘The Diamond’ shared one final emotional moment in the octagon, as he laid down his gloves in front of his hometown crowd.