Castellano won the Eclipse Award for Outstanding Jockey four times in a row from 2013 to 2016.

[2] Castellano began his riding career in 1996 at Santa Rita and La Rinconada racecourses in Venezuela.

[1] In 2013, he finished the year with purse earnings of over $26.2 million, surpassing the single-season record previously held by Ramon Dominguez in 2012.

[6] In 2023 Castellano won two legs of the Triple Crown on two separate horses, winning aboard Mage in the Kentucky Derby and Arcangelo in the Belmont Stakes.

His younger brother Abel Castellano, Jr. (born 1983) is also a jockey and rode his first winner on September 22, 1999, at Santa Rita Race Course in Venezuela.