The American invites the top 10 athletes from the 2015 PRCA , WPRA and PBR world standings .
The American pits them against underdogs who advance from the American Semi-Finals , held Feb. 17 - 21 in Fort Worth .
The American invites the top 10 athletes from the 2015 PRCA , WPRA and PBR world standings and pits them against underdogs who advance from the American Semi-Finals , held Feb. 17 - 21 in Fort Worth .