[1] The Kingston native made his international debut at the 2001 World Youth Championships in Athletics, finishing sixth in the 400 m hurdles semi-finals.

Phillips took to the senior circuit in 2003 and broke the 50-second-barrier in 2005, setting a personal best of 49.96 seconds in Arlington, Texas.

The following year he represented Jamaica at the 2008 Summer Olympics and reached the semi-finals of the 400 m hurdles.

He closed the season with a bronze medal win at the 2008 World Athletics Final, finishing behind compatriot Danny McFarlane and American Kerron Clement.

[2] He lowered his personal best to 48.36 seconds at the Grande Prêmio Brasil Caixa meet in May 2009, making him the sixth fastest Jamaican in the event.