Conor McGregor does 10 year challenge to show how he's bulked up

McGregor's comparison post — which he captioned: '5 world titles later' — shows that he has bulked up significantly since he was 20. The Irishman has also inked his torso with tattoos.

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UFC legend Conor McGregor's shows off huge back muscles while comparing new bulky physique to chimpanzee and Teenage Mutant Ninja Turtle

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Conor McGregor does 10 year challenge to show how he's bulked up

Morning Report: Daniel Cormier: Justin Gaethje's Conor McGregor steroid claims are 'very serious' accusations - MMA Fighting