7 WWE Superstars who won World Championships before they turned 30

#2 Brock Lesnar (Age - 23)

The Next Big Thing arrived made his mark at SummerSlam in 2002 when he defeated The Rock to claim the Undisputed Championship.

The youngest World Champion on this list, Brock Lesnar's rise to the top was meteoric. Debuting on the Monday Night RAW after WrestleMania 18, the young Lesnar would demolish everyone in his path, rightly earning himself the moniker - The Next Big Thing.

Within months of his debut, Lesnar would win the 2002 King of the Ring competition, crushing Rob Van Dam in the finals, and would follow that up by becoming the number one contender for the Undisputed Championship.

Facing off against The Rock who was Lesnar's toughest challenge, the former eventually fell to the latter, who became Champion just 126 days after his debut at the age of 23. As the top dog, Lesnar would sign an exclusive contract with SmackDown, and carry the Blue Brand with an impactful, entertaining feud against The Undertaker.

After vanquishing the Phenom inside Hell in a Cell, Lesnar would eventually lose the title to the Big Show owing to a betrayal by Paul Heyman but would win the title back at WrestleMania 19, proving that he was indeed a top-flight Superstar.