Baker (Roscoe) is born in Thomasville, Georgia.

Roscoe Baker is the son of Edwina Baker Curtis and grows up in Roxbury home of Barbadian immigrants Gustavus and Edna Haynes, whose other sons include Michael and Roy Haynes. A star athlete at Roxbury Memorial High School, he graduates from Delaware State College, and goes on to teach at the Timilty Middle School and serve as the first Black director of the Roxbury Boys Club, and a referee at the high school, college, and professional level. He dies in Dorchester on May 17, 2026.