Elon Musk's "X Bracket Challenge" offers a trip to Mars as the grand prize for a perfect bracket, while ESPN's Tournament Challenge offers dozens of opportunities for participants to win money ...

Perhaps that's why in the history of ESPN's Tournament Challenge, there never has been a perfect bracket. In fact, only once in the past seven years has anyone even gone 32-0 entering the Round of 32.

Perhaps that's why in the history of ESPN's Tournament Challenge, there never has been a perfect bracket. In fact, only once in the past seven years has anyone even gone 32-0 entering the Round of 32.

The challenge is free, and players have the chance to win over $20,000 in prizes and a trip to Hawaii for the 2019 Maui Jim Maui Invitational basketball tournament.

According to ESPN, one user in its women's NCAA Tournament bracket challenge was a game short of having a perfect March Madness bracket.

Perhaps that's why in the history of ESPN's Tournament Challenge, there never has been a perfect bracket. In fact, only once in the past seven years has anyone even gone 32-0 entering the Round of 32.

There were 14.7 million brackets entered in ESPN's Tournament Challenge prior to the start of the NCAA tournament. After just 16 games, only 108 remain unblemished.

Perhaps that's why in the history of ESPN's Tournament Challenge, there never has been a perfect bracket. In fact, only once in the past seven years has anyone even gone 32-0 entering the Round of 32.

Perhaps that's why in the history of ESPN's Tournament Challenge, there never has been a perfect bracket. In fact, only once in the past seven years has anyone even gone 32-0 entering the Round of 32.

Elon Musk's "X Bracket Challenge" offers a trip to Mars as the grand prize for a perfect bracket, while ESPN's Tournament Challenge offers dozens of opportunities for participants to win money ...