Unsurprisingly, the Jamaican trio of Usain Bolt, Nickel Ashmeade, and Yohan Blake automatically qualified to tomorrow's Olympic 100m semifinals. They'll be joined there, though, by a full B team of Jamaicans. Kemarley Brown, Andrew Fisher, and Jak Ali Harvey all are Jamaican-born, and all qualified---but representing Bahrain, Bahrain, and Turkey, respectively. 

Blake and Harvey went 1-2 in their heat, Bolt and Fisher went went 1-2 in theirs, and Brown won his heat over Chijindu Ujah. So six of the 24 semifinalists---a full quarter of the field---are Jamaican.

The reasons why are simple. Bahrain, Turkey, and other countries have been paying athletes to become citizens (Turkey dominated the European championships this summer with a full complement of free agent signings).

if you're wondering when Bahrain got good at track, like Qatar, they often offer athletes salaries to change citizenship

— David Epstein (@DavidEpstein) August 13, 2016

And it's really, really hard to make the Jamaican sprint team. Fisher, Brown, and Harvey are three of the fastest men in the world, but Fisher and Harvey weren't even able to be the first Jamaican finishers in their 100m heats at the Olympics. Jamaican athletics head Dr. Warren Blake said last summer to the Jamaican Observer that the athletes "said it's getting difficult to represent Jamaica and they want the opportunity to represent because they are thinking of migrating to Bahrain and becoming citizens of that country."

Ashmeade and Harvey are together in semifinal 1, Fisher and Bolt are together in semifinal 2, and Blake and Brown are together in semifinal 3. The top two finishers in each heat plus the next two times advance; there is one American in each semifinal, meaning a 100% American/Jamaican final is very much on the table.