[3] She graduated in the top five percent of her class, and given her athletic ability, she gained a scholarship to study political science at Virginia Tech.

Outdoors, she won the ACC 100 metres hurdles title and ran a personal record time of 12.81 seconds for the season.

[8] She was a semi-finalist at the 2008 United States Olympic Trials and claimed her second international medal, a silver behind Ofili, at the 2008 NACAC Under-23 Championships in Athletics.

[12] Castlin closed her career with the Hokies having won four ACC titles, broken the conference record for the 100 m hurdles and taken eight All-American honors from NCAA competition.

Castlin turned professional after leaving Virginia Tech, gaining an Adidas sponsorship, and set a season's best of 12.83 seconds at the 2011 USA Outdoor Track and Field Championships.

[13] She secured her first national title at the 2012 USA Indoor Track and Field Championships, setting a personal record of 7.84 seconds in the process.

In spite of her entering the competition as one of the favourites, she failed to finish her heat as she mistook the sound of the starter's pistol for a recall (due to the echo in the hall) and stopped running before the first hurdle.

She greatly improved her personal record to 12.56 seconds as runner-up at the Bislett Games in Oslo – a time which ranked her sixth in the world for 2012.

[18] Castlin tried to defend her national title at the 2013 USA Indoor Track and Field Championships, but was beaten into second place by Nia Ali.

[19] At the 2013 USA Outdoor Track and Field Championships she had her best national placing yet, taking sixth in a time of 12.61 seconds (her fastest that year).

[30] HSInternational Sports Management announced its signing of Kristi "Hollywood" Castlin, the Rio Olympic Bronze Medalist at 100 m Hurdles.