1: Brock Lesnar
Brock Lesnar has had many people tell him 'you can't do that!'
When he failed to get a scholarship to a four year university by virtue of his wrestling skill, he competed in a junior college instead and racked up such an impressive record the same universities which had rejected him were begging him to enroll.
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When he tired of pro wrestling's hectic schedule and chose to go into MMA, he was told flat out by Dana White that he was going to fail. White would sign Brock anyway, knowing the big man would be a ratings draw, and after a brief stumble against Frank Mir Lesnar would go on to be UFC heavyweight champion.
In recent years, Ryback attempted to get physical with Lesnar, and paid the price. The Beast took down the Big Guy with a simple double leg hook and then hit him twice. Brock then simply got up and walked away, leaving a dazed and defeated Ryback on the floor seriously pondering his life decisions.
Brock's status as a champion in the legit fighting game, as well as his unparalleled athletic acumen, put him at the top of this list.
There you have it: Ten of the toughest men to ever work in the wrestling industry.