Winning a silver medal in the two-man bobsled completion, along with Pierre Lueders, at the 2006 Winter Olympics made Lascelles Brown the first Jamaican-born athlete to medal at the Winter Olympics, but his success in the sport stretches further back. As early as 1999 he was part of the Jamaican national bobsled team and he participated in his first Olympics in 2002 as a brakeman. With Winston Watt, he set the track push record for the Games that year. He left the Jamaican team for Canada in 2004, winning gold and bronze medals in the two-man and four-man event respectively at the 2005 World Bobsleigh Championships in Calgary. Awarded Canadian citizenship in 2005, he captured silver at the 2006 Winter Olympics and another at the 2007 World Championships in St. Moritz, this time with the four-man crew. He remained an active competitor through the 2010 Winter Olympics, earning a bronze medal in the four-man event alongside Lyndon Rush, David Bissett, and Chris le Bihan.