2. Brock Lesnar
In June 2002, Brock Lesnar won a shot at the Undisputed Championship at SummerSlam by winning the King of the Ring tournament where he defeated Rob Van Dam in the final match. After his feud with Van Dam, he started feuding with The Rock who was the Unified Champion at that time, the both wrestled for the Championship at SummerSlam and Lesnar won the match, becoming the youngest (25) WWE Champion ever till date, a record previously held by The Rock. During his 84-day long title reign the word “Undisputed” was dropped from the WWE Championship’s name as Eric Bischoff introduced the World Heavyweight Championship for Raw, after Lesnar’s title became exclusive to SmackDown on September 2, 2002, as per the Brand War storyline. After September 2, 2002 it was at TLC, that WWE brought back the Undisputed Championship.