2. Losing his UFC debut

Lesnar might be billed as the only man to win the WWE and UFC world titles, but his time in the Octagon did not start on a bright note.

Lesnar made his debut at UFC 81 against former UFC Champion Frank Mir. Lesnar secured multiple takedowns on Mir, but the wily veteran countered immediately following a Lesnar takedown and locked in a kneebar. Brock had no option but to tap out.

Lesnar actually got beat in 1:30 of the first round.

Edited by Staff Editor