Marvin Anderson (born 12 May 1982) is a Jamaican sprint athlete.

He finished sixth in the 200m final at the 2007 World Championships in Osaka where he also won a silver medal in the 4×100m relay team for Jamaica. He is a former student of Duncans All Age and William Knibb Memorial High School.

Anderson represented Jamaica at the 2008 Summer Olympics in Beijing. He competed at the 200 metres and placed third in his first round heat after Marlon Devonish and Kim Collins in a time of 20.85 seconds. With this result he qualified for the second round, but he did finish the second race and was eliminated.

He tested positive for the stimulant 4-Methyl-2-hexanamine in June 2009. A disciplinary panel organised by the Jamaican Anti-Doping Commission (JADCO) cleared him of a doping infraction on the grounds that the drug was not on the World Anti-Doping Agency's banned list. However, JADCO appealed their own panel's ruling, stating that the athlete should be disciplined as the drug was similar in structure to the banned substance tuaminoheptane.

Emmanuel Callender (born 10 May 1984) is a track and field sprint athlete, who competes internationally for Trinidad and Tobago.

Callender represented Trinidad and Tobago at the 2008 Summer Olympics in Beijing. He competed at the 4 x 100 m relay, together with Marc Burns, Aaron Armstrong, Keston Bledman and Richard Thompson. In their qualification heat (without Callender) they placed first in front of Japan, the Netherlands and Brazil. Their time of 38.26 was the fastest of all sixteen teams participating in the first round and they qualified for the final. Armstrong was replaced by Callender for the final race and they sprinted to a time of 38.06 seconds, the second time after the Jamaican team, winning the silver medal.

Callender set new personal bests in the 100 and 200 meters at the Grande Prêmio Brasil Caixa meet in May 2009, recording times of 10.16 and 20.40 seconds respectively.