Marcellus is now in his 40s but till date there is no information about his married life. It is said that he is still single. There is also no any information related to his love affairs. But he is said to be the father of baby girl named Michelle.
Marcellus received his formal education from Saint Monica Catholic High School. He was one of the best students of that high school. Besides his studies, he was also active in football and track and field. During his days there, he became the National type-writing champion in 1988 and it is reported that he wrote 82 words per minute. Then he joined Columbia University, there he played as a tailback, defensive end, and kick returner. He graduated from there with an undergraduate degree in sociology in 1997. In the 1997 NFL draft, he was selected by the Buffalo Bills. He played with them till 2000 and then he joined San Diego Chargers. In 2001, he was selected at the AFC Pro Bowl team. He announced his retirement in 2007. His net worth is expected to be around $5 million.