Who is Oliver Castillo and why is he our...

[my miss storm cat]

... representative in the International Jockey Challenge in Korea?

Okay I know who Scott Seamer is (rode Ethereal in the Melbourne and Caulfield Cups), Shu Ishibashi (two nice wins this year that I know of.... Dairy Stakes and Arlington with Cosmos Sensor and Nemo Shin), and Niall McCullagh (Ireland / India).

The three names I'm not familiar with are Mazi Yeni (South Africa), Akin Sozen (Turkey) and ummm Americas Oliver Castillo (?).

Someone want to enlighten me?

Thanks!