23 Massive Athletes You Don’t Want To Go Up Against

2. Nikolai Valuev – Boxing

Can you imagine getting punched by a guy who is 7’0” and 328 lbs.? This image goes through the head of every boxer who went against Nikolai “The Russian Giant” Valuev — shortly before his fist went through their head, too. The hard-hitting heavyweight is the tallest, heaviest world champion to date, sporting an exceptional 50-2 record.