User blog comment:Mr.DannyHancock/Garps strength/@comment-99.12.217.139-20101009223028

Becoming Pirate King is not just given to the Strongest person alive. Both Whitebeard and Garp respected Gol D. Roger. Gol D. Roger became Pirate King because He had the Most Freedom to Rule the Sea, He was the Strongest, and He was the one to Proceed the Furthest in the New World.

Garp may be As Strong, but is the weakest of the 3. Whitebeard did not even care to become Pirate King.