This is Mariusz Pudzianowski (his official site while impressive is in Polish, and his English language site is buggy and needs updating).
He is a 5-time World's Strongest Man title winner. For those of you not familiar with Strongman competitions, think of practical application of bodybuilding. Sure those guys look big & diesel, but what can they do? Lift cars & refrigerators. Toss beer kegs over a wall. Lift & carry cannonballs and place them on stands. Oh yeah, this sort of thing is timed against other competitors. It's some pretty freaky stuff, and Mariusz retired from competition in 2008 with more titles than anyone. This is not a man to be trifled with.
In the summer of 2008, my girlfriend and I adopted our second guinea pig. While our first guinea cavy (as they are properly known) Saku is more skittish & cautious, our second cavy is fearless. He has dominated our apartment going wherever he pleases. He is bigger & more muscular than Saku and when the time came to name him, I could think of only one suitable moniker: Mariusz.